Good but one tiny problem
I think this game is great, but there's one tiny problem. You made the switching polarity the SHIFT key. When you need to switch polarity really fast, if u press the shift key 5 times, an alert pops up and it keeps you from playing the game and u get hit a lot. That has killed me a lot. So in ur next version, or in this one, make switching polarity the...Ctrl button or something like that, or one of the letter buttons. Keep up the good work!