Way to kick my ass, last boss. Pfft. But other than that (and the unnecessarily huge power of the best gun), this is a pretty good game. The controls are the best part.
It'd be nice if you could TELL US that things can kill your character. I mean, it looks like you're just trying to avoid running out of ammo until you get to level 17 and suddenly get mauled by a star.
How to beat about 5/6ths of this game:
1) Depress left mouse button. 2) OPTIONAL: move mouse. 3) Wait. ...it's actually kind of fun when your upgrades aren't too good, but the ends of the levels where you just have to wait for all the rest of the squid to spawn and die are incredibly boring. I mean, that happened to me for like a minute once I beat the boss on extreme mode.