I'll agree that the difficulty needs to be increased. Seems the only time I lose is when the computer lucks out and hits a bunch of combos when the blocks refill....
The angle on level 6 is weird in as such that you have to aim a for the guys face, not his head.
Controls were odd....Took a while to get used to it....
Not the greatest sniper game.....
Instead of using the mouse, why not assign keys of the computer keyboard to the notes/keys of the piano keyboard? Then we'd be able to play more than one note at a time, and actually make use of the drum loops....
Or have a midi-like set up where you can record the timing of the notes you do press and meld them all together...