When you get really far in the game and have to keep pressing the +50 button too many times, try hitting the ctrl button on the upgrade hero screen. You will be surprised!
Mods you should read about my pain I am about to type...sooo my first file I got all the way to 3-2 then closed the window thinking the whole time that this was an auto save game. Go back a few hours later find it all gone. Now my second file I get all the way back up to 3-2 (woohoo) then I fight (the guy was in the second room from the bottom) and win (again woohoo) so I save like I have now learned how to do and then when I try to move I find that I have it invisible walls just 360 degrees out of 360.....so yeah moral of story...your first failure will become the reason for your second failure.
math and naming things are my kryptonite