Awesome^max

Awesome game, man

When I played the first level (the tutorial) the character went upwards as if the gravity was inverted, and the sprite was flickering. I could move left and right but I couldn't do anything.

Then I ran the exe with Compatibility Mode set to "Windows 98 / Windows ME" and it worked fine.

Specs:
Win XP Pro, SP3, all latest updates.
Installed .NET framework 3.5, lates visual c++ 2008 redistributable package, latest DirectX.
CPU: AMD Athlon 64 X2 Dual Core 3800
GPU: On board NVIDIA GeForce 6100 nForce 405 with latest drivers.
2 gigs of RAM

Awesome!
You should mention that on XP it needs the Visual c++ redistributable package installed (Won't run without it).
Great work!