The physics are pretty cool, but controlling the ragdoll with a keyboard is a bad idea. You probably would of had a lot better game making it controlled by a mouse.
Pretty fun game, the only thing I hated about it was when a matter of winning the battle or not depended on Veradux casting re-energize on you and he doesn't.
This is a pretty good idea for a game, it's just lacking. Pretty much no progression, just mowing down hundreds of aliens. The only upgrade I really felt was worth it was the amount of ammo you can carry. This has a great possibility of being a great game, make the gameplay a little more faster, maybe some really good unique upgrades on guns or upgrades that cost a lot. Maybe some more RPG elements like gun damage, some more guns. If you could expand on this idea some more this could be a really fun game.