I really like the game, but there's a really frustrating bug that broke at least like 3-4 really good runs. It happens when I alt-tab to do something else and then I get back to the game. basically what happens is that I alt-tab when the game makes me choose a move to upgrade, and the thing that selects the move just disappears and I cannot get it back, so I am basically soft-locked and I am forced to literally end my run. I've lost really good runs because of that.