I must be doing something wrong, because it just drops a bunch of notes/rectangles on me and I lose within half a second. What's the purpose? Chrome on Ubuntu, by the way.
Interesting. Should start fairly slow... The idea is to catch notes that are in key (black ones) while avoiding those that are out of key (red ones). I'll try to slow down the blocks a bit to make it easier.
I tried it again, but there's another problem: There's about a half second latency between hitting the brick and the sound playing. It makes any sort of association hard...