Don't like it too much.
The gameplay itself is somewhat fun, but the lack of a quick guide about the controls on the screen (And not just the description), the unintuitive assignment of buttons (Who puts pause on P??? And who thought that Esc should close full screen instead of pausing the game like any other game?) and not even a sort of checkpoint system (i.e. have a way to continue on skull if you have lost all extra lives) makes it worse than it probably should be...