Playing the demo upsidedown

[likemore]

Hey all. I am having some problems with the demo atm. I have finished it but it was hard to do though playing like the last half upside down. When i started the game, everything was fine. I can move, it wasn't playing upside down and i could do everything in the game. The one problem though and idk if anyone else has this is the light and shadows are flickering whenever i move and idk if anyone else has this problem but i wanted to get that out as well. My main problem which I stated is playing the game upside down. It started happening when i reached the next area in the game where Daniel remembers something from his past. Anyone know a solution to this?

Just incase my Graphics Card is Ati Radeon 2600 XT and i am pretty sure its compatible with the game as most of the games i played don't say that card but they run just fine including the demo. I am pretty sure it ain't a graphic card problem but i will post that incase you need it. Let me know if you need anything else to help me.

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Sry forgot to include this but i run Windows Vista home premium 32-bit version. If need be i will include the rest of my system.