A couple of things could be improved: 1. Use spell check... 2. Graphics aren't all that bad so not much to improve there. 3. needs an actual pause button. 4. Turret placement is a bit unusual... 5. Some enemies don't give a good amount of money based on toughness. (10 gold killing an overpowerd boss that erradicated my defences on wave 2 and the cheepest unit costs 15 gold)...