Nice idea.
It fells to shallow though. But for only 3 hours it is great I guess :-) I would add though, that you get a penalty if you just stand still, or even if you touch cubes of other colors. Because now there is almost no skill involved and you can just stand still. Would also add that you could change colors per keys, so you can run around with mouse all the time and don't have to stand still while changing colors.
I am also not quite clear on which genres you are mixing :-)