A downloadable game

Treasure Jumpers is a simple, local-multiplayer action platformer game created by John Croisant for the January 2016 Lisp Game Jam. It was made with CHICKEN Scheme, SDL2, and chicken-sdl2.

You can watch some screencasts of the game online:

The source code is available under the CC0 1.0 Universal Public Domain Dedication. Image assets are from Kenney Game Assets (alternate download). The assets are also available under the CC0 1.0 Universal Public Domain Dedication.

Treasure Jumpers is intended as an example for using chicken-sdl2. The source code is therefore heavily commented with explanations. You are welcome to borrow freely from the code when making your own games.

The latest version of the Treasure Jumpers source code can always be found as part of the chicken-sdl2-examples repository. You can read about the development process on John's blog.

Default controls


  • Ctrl+S = Screenshot
  • Esc = Exit

Player 1 (pink):

  • W = Jump
  • A = Move left
  • D = Move right

Player 2 (green):

  • Up Arrow = Jump
  • Left Arrow = Move left
  • Right Arrow = Move right

Player 3 (yellow):

  • I = Jump
  • J = Move left
  • L = Move right

You can change the player key bindings by editing controls.txt. Up to 5 players are supported.

Custom levels

I didn't have time to make a GUI level selector, but you can select your level using a command line flag. Compile the game as described in the installation instructions, then run the game on the command line like so:

./platformer --level=path/to/your/level.txt

If you create a fun level and would like to have it included in the game, please email john at croisant dot net.

Known issues

  • The performance of the game gradually degrades over time. After several minutes the framerate becomes very choppy.
  • There is no HUD or GUI to display player scores.
  • There is no way to win. The game never ends.
  • If you walk or slide off an ice tile without jumping, you will have slippery feet until the next time you jump.
Rated 4.0 out of 5 stars
(1 total ratings)
AuthorJohn Croisant
TagsLocal multiplayer, Moddable, Pixel Art, Versus
Asset licenseCreative Commons Zero v1.0 Universal
Average sessionA few minutes
AccessibilityConfigurable controls
MultiplayerLocal multiplayer
Player count1 - 3
LinksDev blog, Source code


treasure_jumper_source.zip 83 kB

Install instructions

Currently, Treasure Jumpers must be compiled from source. It requires the following software:

To compile and run Treasure Jumpers:

  1. Install CHICKEN Scheme, SDL, and SDL_image as appropriate for your operating system.
  2. Install the required eggs:
    chicken-install sdl2 sdl2-image args miscmacros vector-lib
  3. Compile Treasure Jumpers:
    csc -O3 platformer.scm
  4. Run Treasure Jumpers:

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