Changes:
+ Purchasing a tower in the shop now only rewards one instance of that tower
+ Removed higher level towers
+ Wave ending no longer resets shop items, just shop refresh cost
+ Shop refresh cost now starts at 1, and goes up by 1 each refresh
+ Shop menu can now be opened at any time
+ Game no longer pauses when the shop menu is open
+ Player can now "pick up" towers between waves, and place them again
+ Added new tower, the Box
+ Fixed sell value of Orbs you purchased in the shop to no longer be 0
+ Some shop items now reward multiple instances of that item
+ Upgrade icons now stack in the tower inspector
+ Added version number to main menu screen
+ Make base Wisp speed a bit faster
+ Fixed issues with tooltips going off the screen
+ Fixed issue where orb icon color was not being set correctly
+ Fixed issue where user could not select "keep playing" after selecting "view level"
+ Rebalancing
+ Bug fixes