Chroma Keys is a colour game that involves pressing keys to lights as they scroll past.

Medals (5 for 190pts):
Breaking The Ice (10) - Score 5,000 points in one game.

Prochacho (25) - Score 10,000 points in one game.

Prodigy (50) - Score 20,000 points in one game.

Masochistic (100) - Score 30,000 points in one game.

Secret Medal (5) - It's secret!

Gameplay:
The game is basically broken into three segments:

1) Starting out. Hit the buttons when you're supposed to.

2) Middle game. Eventually, the colours will be moving too quickly for you to respond to all of them. At this point I generally pick 2 to focus on, and ignore the others.

3) End game. After 400 colours have gone by, the colours will come so quickly you can't possibly hope to keep up with them. Just lean on an arrow key and wait for time to run out.

It may help to play on a slower computer, but it really doesn't help that much, and either way you still basically just need to make it to 22k points alive and you should get them all.