Controls feel weird, screen too busy as well as small. VERY annoying when powerups shoot off screen. Enemies too frequently spawn in the same location as you. Arrows on screen pointing to health would be nice. Overall didn't really enjoy myself, 2 stars.
Decent game, some levels very frustrating to figure out how each door works. Level difficulty varies way too much, after an insanely difficult level a level which requires no thought at all seems a bit odd.