Glitch:if you die holding a tower press try again and then set it down somwhere on the screen that says play then when you press play game choose a map and it willl be on that map but you cant upgrade or sell it but the tower will kill enemies. Hope i helped!
I Don't really get the the game , it says that you have to leave earth to get more resources and when your on a different planet there's a road but overall i think it was a pretty good game but wave 9 has to many strong monsters to my opinion