Small Update

Electric gem upgrade buffed -The max level will increase based on the unlocked tier -The amount of gems earned is increased from 3 to 5
Bugs Fixed: -Tier 4 level 6 ball value was messed up. -Tower costs for endless mode weren't increasing correctly.
Buying the perm gold upgrade for a tower sometimes gave an extra level by accident, especially if the button was being held.
Added black bars on the dark and gem upgrades to indicate the safe area to scroll.
Changed the tower unlock upgrades to not buy it until it's actually clicked.