I experienced the same bug a lot of people seem to be talking about, I think it has something to do with the cursor settings or something. I'm not a programmer, but I think because the mouse isn't locking into the game, it just doesn't work whatsoever as it swaps between your mouse cursor and the game's cursor. I assume the game's cursor allows for something different to happen, overall though, don't quote me, I'm just guessing the issue here.
Dang, sorry it’s not working. That sounds pretty legit, though I didn’t do anything too weird with the mouse in this one if I remember correctly, so definitely weird. The plan was for a sequel where I’d fix the problems but it has turned into a forever project at this point.
Thanks for giving it a spin and reporting the bug!