You can reset your upgrades from the upgrade screen, for all the people whining about something being to hard/painful/stupid after getting a certain upgrade.
@ aeonus: This game is about the THEME of long lasting, not to create a game that takes an hour to beat. In this game you're supposed to keep the square in the other square for as /long/ as you can
Why would not being able to change the name of an account, which is the standard identifier of the person, deserve a 1/5? Putting the function in would cause chaos, and you can always make a new account.