Make the tower descriptions load instantly. I get that it's trying to be cute and look like it's writing on a whiteboard, but tower defense is inherently about making fast decisions and upgrading/changing your maze layout quickly. Forcing the player to wait in the heat of battle is just poor design.
Also, enough with the generic tower defense games! "It doesnt have a theme" is *not* a theme!
 "Ultimate Tactics"){kind=icon}
 "William and Sly"){kind=icon}
 "Whiteboard Tower Defense"){kind=icon}
 "ButtonHunt 3"){kind=icon}
 "MARDEK RPG: Chapter 2"){kind=icon}