Here is the thing I made for
Ludum Dare 29.
Edit: (ugly) code:
https://github.com/mkehrt/ludumdare29 It's definitely not a game, but it was fun. There's not much to do, but the top and the bottom are the best parts. Use the arrow keys! I maaaay add more at some point.
This was only really tested on Chrome. Other browsers will possibly be confused.