....Well...
It's not too bad, have a good music selection, and the game is a bit interesting and humorous (especially if you go and check out the cut scenes) but there are just so many glitches in this game that I can't enjoy it.
As some have stated, the game has a tendancy to freeze when you get to the second boss, the crab thing. While walking (not running) I found that it would ignore a jump input and, instead, do a dash. Obviously there's a differance between a double tap to one side and pressing up. Another thing I found was that, in the bar, if the mouse passed over the "level select" option, your character would shoot or attack. Nothing hindering, but an error none-the-less. And with the 4th boss, I have literally been knocked off the screen...and I can't walk back past the invisible wall I got knocked through, I can't shoot through it, and the boss' attacks won't pass through either so I can't even die.
I'm not going to attempt to start this over but, as I said, with these gliches, it's losing points. Fix it up and come back, maybe a re-release or just another game where you've done more checking.