I had a completely different game in my mind when beginning this, but this is what I ended up with. Fun for 30 seconds I'd say. :)

So you fly in a "cavern" that is collapsing and shaking around you. Try to collect some score.

Move with arrows, shoot with space.

Points:
- Counts down a little when time passes.
- -1 for one shot
- +100 for collectible
- +500 for collecting all collectibles

Huge thanks for onefifth for web space.