This is a great tower defence game except, it's incredible fun and the upgrade system allows you to progress nicely throughout the game.
Just one major issue with it. Once you have unlocked a retinue of more than about 7 towers, you can't use them in a battle. The game is formatted so that any more towers than 6 don't fit on the screen for you to select. The 7th tower shows by 2mm so you can just about select it if you have children's fingers.
If it wasn't for this one major glitch in the game design it would be 5 stars all day long.
Show less