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.
 "Brazen Clicker"){kind=icon}
 "Min Hero: Tower of Sages"){kind=icon}
 "Tyrant"){kind=icon}
math and naming things are my kryptonite