Can't seem to install correctly.

First off, the porting team website seems fucked because I can't login at all, even after changing my password and using the one it made for me or creating a new account.

I then tried PlayOnMac and it installed but when I load the game up my mouse acts insane. If I go right then it goes in this weird "pong style diagonal and when it reaches the bottom of the screen it bounces off and keeps going in the diagonal direction. Any direction with the mouse causes this strange behavior.