This game is extremely impressive for a prototype and I'm glad that you improved certain points in the full game (which I have on PC and X-Box 360 - I'm addicted!). Some levels are really difficult, but once you complete them, you get a sense of relief, and feel as though you've just achieved something. I love your work and I'm going to buy 'The Binding of Isaac' on steam right now! I hope you guys make SMB 2 because that would be awesome.
The only thing that I didn't really like was the graphics and character animations (or sprites?) so I'm glad to see that you improved them in the proper game. :D
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