Very good fun, with a few minor niggles
There is a lot of game here. I like the way it introduces new concepts to you, but keeps it relatively simple at the same time.
I felt the physics was very off, the guy jumps the height of a skyscraper and floats in the air, which felt very strange. His walk animation is about 8x slower than his walk speed. The sonic noise when collecting stars was a bit strange too! Also really didn't like the way you can't shoot through a dead baddie until they have faded out.
Overall great game though :)