This game is programmed in Lua for Löve2D [Not by me] :

Code look interesting ^^

Have a good day !

that game is great! Where did you find the code?

@Jmv38 Sorry for latent.

When you download it, for example, with the mac version. Open the .app, in Contents/Resources, (copie the file on your desktop), change the extension in .zip, and decompress.