Hi,
Played again, same settings, and no problems this time. I think it may have been my Onboard graphics card which I used last time. This time, with the NVidea 9800 GT it works fine.

An idea came to mind: How about a mutator that makes a player more and more vulnerable to pushes, the longer he is alive?

I also agree about the explosions.
And the AI beats me every time

Yet, the game is more fun every time I download. Keep it up!