This is a really dumb question, but

[Re: Your Brains]

considering how gimped the PC version is, I can't believe I have to ask it.

How on earth do I use the "screw" in this?

[colwag]

Watch the instructions at the start of the game. :P

Q for player one, P for player two. Automatically launches a screw to the other player. If they get it wrong, you get a cash bonus.