Wowza~! This game is incredibly well-thought out and a super clever concept. Controls were a bit finicky, but honestly, I can forgive that since you made this in 12 hours. Art is simple and clean, I really like the palette choice. Def think you should work on this more and add some shader-y polish or arcade-like lighting or glow effects to the assets.
Awesome job and keep it up!
- S.