This is actually quite a challenging game. I enjoyed it a lot, but it does need a whole HELL of a lot of work, I can tell you. Programming and artwork both need some redoing, if I may say so.
First off, the occasional pop-up of the mouse pointer kind of defeats the purpose of an "invisible cursor," now doesn't it? I do realize that this is probably just an issue that couldn't be fixed. Also, if I may say this, DISABLE THE RIGHT-CLICK. I got through the game in about a minute or less just because of being able to perform a right click. Or at least make an on right-click command so that way whenever someone does that during the level, it'll make them restart the level or restart the game for that matter.
Artistically, I find myself kind of annoyed with how simple it is. Yeah, you changed the darkness and brightness of some colors, trying to add a little bit of a "flare," so to speak. I couldn't find myself entrapped in anything of the sort.
The music was the closest thing to fitting for the game. Next time, though, may I suggest that you choose something more soothing for the player so that way he/she could take their time with it instead of feeling like they should try to rush it just because of the beat?
~Review Request Club~