fantastic. here are some ideas:
some of the tone are drastically different. we should be ablle to have as many istruments as we want and choose out of the 8 tones. i understand you Kong AP problem and i think you have made up for it fantastically. you should add a guitar-like tone as well. But right now the most cooleresteriffical thing would be having more instruments, like maybe 5 would be a good number. an easy way to implement this would be to just have copies of each insstrument but locked at each tone, so users can not have the tone in their song by just not putting notes on there.
Interesting... strage, but fun. when I hold the down arrow down, it would be nice if he would stay down rather than go up and down repeatedly. Also, his reactions are delayed, so a screw takes a long time to recover from. Otherwise, good game. 4/5.
In response to felipeaom, I think the penalty of death should be start at the beginning of the cave (or a checkpoint, it it's REALLY big), but no reset to the game world, like Borderlands does. And again, without lives. + please so Dev can see this.