Is there any way I can change the jump button to the spacebar? This would make gameplay easier.

I've tried a couple of third-party key-bind changing programs, and they seem to work for programs like Notepad and Word, and several other programs, but not Worms 3D.

Any help would be appreciated greatly!

You can use the middle mouse button, that way it is even quicker than the space bar. Enter button used to be a right pain in the bum in "to boldly go"