Kaboom Cove

1 Overview

A pirate brick breaker for the web. Aim the ship's cannon, fire volleys of cannonballs that bounce around the arena and break the cargo before it reaches the deck. Powder kegs blow up their 8 neighbours, the Bomb opens a 3x3 hole, treasure chests give extra cannonballs. Plain HTML, CSS and JavaScript: upload the game/ folder to any web host.

• 50 campaign levels in 10 chapters (Sunny Cove to Treasure Island), each chapter closed by a sea boss: the Kraken, Captain Claw, the Magma Serpent and seven more.
• Endless sea (a new row every volley) and a Daily challenge (the same level for everyone all day, with a win streak bonus).
• Doubloons, three active missions, star milestones, a shop with three cannon upgrades and six cannonball skins.
• Blocks: crates, barrels, reinforced blocks, powder kegs (chain explosions), rum barrels (burn the row), treasure chests (+2 cannonballs) and anchors.
• Desktop layout with side cards and a phone layout for portrait screens; mouse, touch and keyboard.
• 14 interface languages; parrot narration in English, Portuguese and Spanish; 29 sound effects and 4 music tracks.
• No server, database, account or external service. Optional ads between levels (off by default).

2 Installation (no coding)

The game/ folder is the finished game. You do not need Node.js, a database or PHP to publish it.

1. Extract the ZIP on your computer.
2. Open your hosting file manager (cPanel, Hostinger, Plesk...) or an FTP program such as FileZilla.
3. Create a folder for the game, for example public_html/kaboom-cove/.
4. Upload everything inside game/ into that folder (not the game folder itself), keeping the subfolders src/ and assets/.
5. Open the address in a browser, for example https://yoursite.com/kaboom-cove/. Test on a phone too.
6. To embed it in another page, use an iframe pointing to that address (allow full screen if you want the full-screen button).

game/ is exactly what npm run build writes from source/ (same files, byte for byte). After editing source/, build again and upload the new dist/ contents the same way.

3 Requirements and sound

Any current browser (Chrome, Edge, Firefox, Safari on desktop, Android and iPhone/iPad) with JavaScript enabled; any static web host with HTTPS. The game runs in a canvas and needs no plug-in.

Browsers only start sound after a tap or click: the "Tap to start" screen takes care of that (turn it off in the settings file if you prefer). Every file is inside the package; by default the game makes no request to any other site.

4 How to play

Each volley fires 10 cannonballs (more with upgrades and treasure chests) that bounce off the walls and the cargo. After every volley the cargo moves down one row; if it reaches the deck, the level is lost. Win in few volleys for 3 stars (the right card shows the limit). Powder kegs explode their 8 neighbours and can chain; rum barrels burn their row; anchors cannot be broken and sink at the danger line. Breaking cargo charges the Bomb: arm it, and the first cannonball of the next volley blasts a 3x3 area. The fifth level of a chapter opens its boss; Endless sea and the Daily challenge are on the level map.

5 Screens (numbered)

1 2 3 4 5 6 7 8

Marks on the screenshot

1. 1 Game logo
2. 2 Play: continues at the next level
3. 3 Levels: the map with chapters, bosses, Daily challenge and Endless sea
4. 4 Skins: the shop (cannon upgrades and cannonball looks)
5. 5 Score: the local "My score" screen with missions
6. 6 Settings
7. 7 Stars, total score and doubloons
8. 8 Language (14)

1 2 3 4 5 6 7 8 9

Marks on the screenshot

1. 1 Level card: number, name, hint, cargo left, chapter progress
2. 2 Score: the local "My score" screen with missions
3. 3 Pause
4. 4 Settings (pauses the level)
5. 5 Volley card: volley count and the stars still possible
6. 6 Stars collected
7. 7 Bomb (charges as you break cargo)
8. 8 Game speed 1x / 2x
9. 9 Arena: drag or move to aim, release or click to fire

1 2 3 4 5 6 7

Marks on the screenshot

1. 1 Result
2. 2 Stars won
3. 3 Score and best
4. 4 Doubloons earned
5. 5 Next level (or the chapter boss)
6. 6 Try again
7. 7 Levels: the map with chapters, bosses, Daily challenge and Endless sea

1 2 3 4

Marks on the screenshot

1. 1 Result
2. 2 One more chance: 25 doubloons, the cargo moves up and the level goes on
3. 3 Try again
4. 4 Levels: the map with chapters, bosses, Daily challenge and Endless sea

1 2 3

Marks on the screenshot

1. 1 Cannon upgrades (extra ball, quick fuse, spyglass)
2. 2 Cannonball skins: unlocked by stars or bought
3. 3 Stars collected

1 2 3 4 5

Marks on the screenshot

1. 1 Music volume
2. 2 Sound effects volume
3. 3 Parrot narration volume
4. 4 Language (14)
5. 5 Close

1 2 3

Marks on the screenshot

1. 1 Chapter islands: five levels and a boss each
2. 2 Stars collected
3. 3 Close / back

1 2 3 4

Marks on the screenshot

1. 1 Resume
2. 2 Restart the level
3. 3 Levels: the map with chapters, bosses, Daily challenge and Endless sea
4. 4 Main menu

1 2

Marks on the screenshot

1. 1 Missions (three at a time, paid in doubloons)
2. 2 Best result of each level, from this device

6 Files

game/                          upload THE CONTENTS of this folder to your web host
  index.html                   entry page (all screens)
  kaboom-cove.config.js        settings: ads, Tap to start, full-screen button
  style.css, style-2.css       layout and screens
  kaboom.css, kaboom-2.css     the pirate skin
  src/                         the game code (ES modules)
  assets/                      pictures, sounds, music, narration, fonts, icons
source/                        the same game, editable, with tests and tools
  src/levels.js                the 50 levels
  src/modes.js                 bosses, Endless sea, Daily challenge, prices and rewards
  src/sim/config.js            cannonballs per volley, speeds, scoring
  src/locales/<lang>.js        texts, one file per language (14)
  src/render/                  arena drawing (view.js, view-arena.js, view-fx.js), colours, skins
  src/ui.js                    HUD and screens
  test/                        node --test tests
  tools/                       build, local server and level tools
  package.json, package-lock.json
documentation/                 this guide (index.html), customization.html, img/
DOCUMENTATION.html             opens this guide
CUSTOMIZATION.html             opens the step-by-step customization guide
THIRD-PARTY-LICENSES/          font licences

New to code? Open CUSTOMIZATION.html (in the root of the download, also documentation/customization.html): step-by-step recipes with numbered screenshots that show the exact file behind every part of the screen (pictures, parrot, blocks, bosses, sounds, music, texts, colours, font, difficulty, prices), free editors, backup and publishing.

7 Settings file and optional ads

kaboom-cove.config.js (next to index.html) holds the settings that need no coding. Edit it with any text editor, save and reload the page (Ctrl+F5). There is nothing to build.

window.KABOOM_CONFIG = {
  ads: {
    provider: 'none',      // 'none' | 'adsense' | 'custom' | 'demo'
    adsenseClient: '',     // AdSense only: 'ca-pub-1234567890123456'
    testMode: true,        // AdSense only: Google test ads while you test
    midgame: true,         // ads between levels on/off
    minLevel: 2,           // never before this level
    midgameEveryMs: 150000, // at most one ad every 2.5 minutes
    custom: null,          // 'custom' only: { interstitial() {...}, rewarded() {...} }
  },
  tapToStart: true,        // false = open straight on the menu
  fullscreen: true,        // false = hide the full-screen button
};

Ads only appear between levels, after the level set in minLevel, never more than once per midgameEveryMs and only after two finished levels. The sound mutes and the game pauses during the ad. A blocked or failed ad never stops the game. "One more chance" after a defeat costs doubloons, not an ad. The adapter is src/platform.js.

8 Editing levels

The 50 campaign levels are in source/src/levels.js, one object per level, with a legend at the top of the file. A map lists the rows from top to bottom, 7 cells per row: . empty, a number = a regular block with that many hit points (N12 for 10 or more), R8 reinforced, C powder keg, T treasure chest, M rum barrel, A anchor. par is the number of volleys for 3 stars, waves are extra rows that drop in during the level, pulse turns the Bomb on or off.

{
  id: 'first-spark', v: 1, par: 2,
  map: [
    '. . . . . . .',
    '. 2 . . . 2 .',     // 7 cells per row, top to bottom
    '. . . 3 . . .',     // numbers = hit points of a regular block
  ],
  pulse: { enabled: false }, // no Bomb in this level
  witness: [[[1900,0,-1]]],  // winning shots, written by the validator
},

1. Edit the map and raise the level's v (old best scores of that level stop counting).
2. In source/, run node tools/validate.mjs --solve 7 (7 = the level number): it searches a winning sequence in the real simulation and writes it into witness (then npm run format tidies the file).
3. Run npm run validate to check all levels (map, room above the danger line, witnesses, simulated players) and npm test.
4. Optional: node tools/curve.mjs 11-20 shows how often a casual simulated player wins each level; node tools/check-modes.mjs checks that every boss can be beaten.
5. Run npm run build and upload the new dist/. Level names and hints are the texts l1...l50 and h1...h50 in src/locales/.

Bosses, Endless sea and the Daily challenge are generated in src/modes.js (ESCORT, RAGE, bossHp, waveRow); the simulation numbers (10 cannonballs per volley, speeds, scoring) are in src/sim/config.js.

9 Economy and prices

Every price and reward is a constant in source/src/modes.js (doubloons are the only currency; there are no real-money purchases).

After changing the economy run npm test (some tests check the rules, for example that the Daily challenge pays once a day). src/save.js caps edited saves (balance up to 999,999).

10 Languages

The interface has 14 languages: English, Portuguese (Brazil), Spanish, French, German, Italian, Dutch, Polish, Turkish, Russian, Indonesian, Japanese, Korean and Chinese. The game uses the browser language on the first visit, ?lang=pt in the address forces one, and the player can change it in Settings. Each language is one file in src/locales/ (for example src/locales/fr.js); English fills any missing key. Keep placeholders such as {n} when you edit a text. The parrot narration is recorded in English, Portuguese and Spanish (assets/voice/en|pt|es/); the other languages use the English voice. The 11 languages besides English, Portuguese and Spanish were machine translated; have a native speaker review them before a big launch.

To add a language: copy src/locales/en.js to a new file, translate it, import it in src/locales.js and add it to LANGS, HTML_LANG, NUMBER_LOCALE and DICT there. The title font covers Latin languages; others fall back to the system font.

11 Saving and the score screen

Progress is saved automatically in the browser (localStorage) of each player, on each device. There is no account and no cloud sync. Clearing the site data, another browser or another web address starts a new save. Private windows may not keep it.

kaboomcove.template.save.v1      levels, stars, best scores, doubloons, skins, upgrades, missions, bosses
kaboomcove.template.settings.v1  volumes, less motion, vibration, glow, speed
kaboomcove.template.lang.v1      language chosen by the player

The "Score" button opens the score screen: the sum of the best result of each level, the stars and the active missions, all read from this save. This edition has no online leaderboard and sends nothing to a server. Hosting two copies of the game on the same domain? Change the prefix kaboomcove.template in src/main.js, src/save.js and src/i18n.js of one of them.

12 Internal names in the code

The engine of this game was first written for another theme, so some internal keys keep neutral or older names. Everything the player reads comes from the language files (src/locales/), so you can rename anything in the texts without touching the code.

13 Development (optional)

The game is plain HTML, CSS and JavaScript (ES modules): there is no compile step, source/ is the editable game and npm run build only copies it into dist/. Node.js is needed only for the tests, the level tools, the local server and that copy.

New to Node.js? 1) Install the LTS version from nodejs.org (Windows or macOS installer) or with your package manager on Linux; it must be 26.13 or newer. 2) Close and reopen the terminal, then run node -v and npm -v. 3) Open the terminal inside the source/ folder (the one with package.json). 4) Run npm ci to install the exact tools from package-lock.json (only Prettier). 5) Run npm test, then npm run build to write the game to dist/. 6) Try it with npm run dev (http://localhost:5190/) and upload the contents of dist/ like game/. Common errors: node or npm not found (reopen the terminal or fix PATH); on Windows PowerShell npm.ps1 cannot be loaded (use npm.cmd ci or the Command Prompt); ENOENT package.json (you are not inside source/); EBADENGINE (Node.js older than 26.13); network or proxy errors during install; npm ci complaining about the lock file (do not edit package-lock.json; delete node_modules and retry).

cd source
npm ci              # installs Prettier from package-lock.json
npm test            # 58 tests
npm run dev         # http://localhost:5190/
npm run build       # writes dist/ (same as game/)
npm run validate    # checks the 50 levels (about 2 minutes)

npm run build deletes dist/ and copies index.html, the CSS files, kaboom-cove.config.js, manifest.webmanifest, favicon.ico, src/ and assets/ into it. If you add a new file next to index.html, add its name to PARTS in tools/build.mjs. npm run format re-formats the code with Prettier. Test shortcuts (only on localhost): ?debug&level=12 opens any level, ?boss=3 opens a chapter boss, ?nosplash skips "Tap to start".

14 Updating and cache

To publish a new version, upload all changed files together and keep the same web address (the save belongs to the address). If players still see the old version, it is the cache: a hard reload (Ctrl+F5 / Cmd+Shift+R) or a private window shows the new files; also clear your host or CDN cache (Cloudflare and similar) if you use one. Adding ?v=2 to the address is a quick way to check that the server has the new index.html.

Clearing the cache without losing progress

Progress is stored in this browser, not on the server. Clearing cached images and files, or doing a hard reload, keeps your progress.

Computer: press Ctrl+F5 on Windows and Linux, or Cmd+Shift+R on macOS. Phone: in the browser settings, choose the option to clear cached images and files.

Do not choose cookies and site data, or clear site data, for the game's address. That deletes the local save.

15 Screenshot gallery

16 Licenses

The game code, artwork, sound effects, music and narration are covered by the license you bought for this item. The fonts are third-party and free: Fraunces (titles) and Chakra Petch (numbers and labels), both under the SIL Open Font License 1.1; the full notices are in game/assets/fonts/ and THIRD-PARTY-LICENSES/. Prettier (MIT) is an optional development tool installed by npm ci; it is not part of the game.

17 Troubleshooting

18 Support

Questions about this template and custom work: willian@polargames.com.br.

Support request

When you write to support, include the browser and device, the game version, the page address, the steps that caused the problem, a screenshot and the first error shown in the browser console. Never send passwords, payment details or secret keys.