It's a Cool Concept...
But the execution seems wrong somehow. I can't quite put my finger on it, but it seems like it should be less of a mouse game and more of a keyboard game... Something akin to Marvin Spectrum, perhaps?
Definitely a cool idea, but I'm sure I speak for many others when I say I hate games with one level. I don't want to have one level to accrue a score, because I already know what's in store for me the next time I play THE EXACT SAME THING.
If you made it some kind of input game where the letters would flash and you'd have a second or two to type that letter on your keyboard, that might make for some more frantic/varied/interesting gameplay. I did enjoy the artwork, I must say. But as it stands right now, though, there's just something a little off about the fun level.
--WF