Thanks for your feedback !
I desaturated background colors and added a small tutorial in level 1 (only on github, exported versions will remain untouched until the end of the game jam).
Very nice, but way too hard for me. :D
This idea definitely deserves to become a "real" game (sound, music, more levels...).
Keep up the good work !
Looks great, but it seems it does not work with Godot 2.1.2. Could you please suggest a Godot release or export the game ?