Thanks for your feedback and the great suggestions, I will fix the window mode and the black pixel.
About the speed of the enemies, there is a bug, I have to fix that when I have time, its seems to be using much ram.
About the other bugs, I didn't see it when I played, I will have to test more to see why it happens.
Ah, and unfortunately I can't play your game because I use linux, but it seems very cool.