Originally posted by Onion:

Are you people kidding me? I should buy a different mouse just so I can play this game?
I like my trackball and don't want anything different.

You're using pretty niche hardware. I'm honestly surprised you haven't run into this problem sooner and found a solution already.

But like the very first reply says, find software to emulate mouse functions like a scroll wheel. This won't be the last time you encounter this issue if you want to keep using a trackball.