So, I'm in the first upgrade screen and have no clue whatsoever on how to select an upgrade. It says "Submit by holding"... holding what?? How does it work? Kinda annoyed that I can't figure it out, because the game looks cool.
Edit: Power of posting, when going full screen the alignment is off, so it doesn't respond. When I go out of fullscreen clicking (and holding) the upgrade actually works. Something to fix! :-)