Sorry for the low score.
The game itself: Great. But the timer: Not so great.
I was only able to beat this game by right clicking, waiting until the music stopped, and then playing without a timer (It shows a big "-"). After seeing how many stages of the final boss there are, it's pretty obvious that the game is virtually impossible. I imagine the game runs slower than intended for most players, since beating the game took about seven minutes at least, about two minutes for the final boss alone. With maxed-out weapons. Never moving out from under its hit points.
Until you can find some way to make the game run normally for everyone, I'm afraid I can't recommend this to anyone except for a quick look. If it helps, I'm using Safari 4.0.3 on Mac OS 10.5.8, 1 GB RAM, 1.83 GHz. Intel. ... Hold on... *Activity Monitor* Memory: 10 MB free... >_< Could that be the problem? Well, in any case, the game's timer runs down before I have a chance to win, and my computer shouldn't affect that *this* much. It should probably be tied to the number of frames that... err... something... Argh, I can't think anymore. I may as well submit.