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Boomerang adventure game for JS13k!
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LICENSE Create LICENSE Sep 14, 2019 Update Sep 14, 2019
game.js Add files via upload Sep 14, 2019
gameEngine.js boss blood should not be additive Sep 14, 2019
gameEngineDebug.js Add files via upload Sep 14, 2019
index.html Move game code to game.js Sep 14, 2019
screenshot.png Add files via upload Sep 12, 2019
tiles.png Tweaking to a few tiles Oct 2, 2019

When life gets you down, it's never too late to...


A Boomerang Roguelite Game for JS13k by Frank Force


Bounceback Image


  • WASD = Move
  • Mouse = Aim
  • Click = Throw
  • Space = Dash


  • Boosting protects you from damage.
  • Buy items to help you survive.
  • You don't lose money when you die!
  • There are only 10 levels.
  • Lost boomerangs show up big on the map.
  • Enemies are slowed by sand.
  • Yellow boormang can grab pickups.
  • Blue boomerang does double damage.
  • Win to unlock speed run mode.

Game Features

  • Boomerang physics & boost ability
  • Procedural level generation
  • 3 Enemy types
  • 7 types of pickups
  • Giant and invisible enemy variants
  • Final boss battle
  • Saves gems earned and max level reached
  • Shop system for buying items
  • Minimap
  • Footsteps, blood, and persistant effects system
  • 16 Different sound effects with zzfx
  • Procedurally generated music
  • Speed run mode doesn't effect normal save
  • Low health warning system
  • Level transition effect

Engine Features

  • Engine is separated from game code
  • Object oriented architecture
  • 2D game object system with pseudo 3D
  • Physics and level tile collision
  • Tile rendering system
  • Cached level rendering
  • Particle system
  • 3D shadows
  • Input processing system
  • Debug rendering system

Engine Debug Features

  • Debug console
  • Debug rendering
  • Debug controls
  • Save snapshot

Minification Notes

  • The official release is under 13k for the game, engine, art and music!
  • The tile.png file has 14 color palette exported from Gimp with all extra save data disabled
  • First combine all javascript together
  • Remove all debug code, godMode, soundEnable, and controls description
  • Use Google Closure on Advanced
  • Use terser with extra compression turned off
  • Put eveything into the same html file and remove any whitespace
  • Zip the index.html and tiles.png files
  • Zip the zip with advzip using the settings "-z -4 -i 1000"
  • Say a small prayer to the gods of JavaScript
  • The final result should hopefully be under 13k!
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