Incredible! Such a great TD game. Great graphics and gameplay. Only thing lacking is a persistent upgrade system like star defense or kingdom rush. Hands down star defense has the best upgrade system. So many attributes to upgrade and when youve maxed those you still have the three general attributes to upgrade per tower! Plus those last upgrades have no cap!! You can continue to upgrade your towers until youre unstoppable. Great incentive for continuous in app purchases! Ive spent quite a bit on getting my enertron towers up a couple hundred levels. All I ask is that the in app purchases be reasonable. Too much and I wouldnt spent real world money on in app currency. Oh, and if you want to add a little something extra you could try giving the player some kind of assistant drone like sentinel 3 or hero like in kingdom rush. Im going to be watching for your third game since it was mentioned on your site! Plus sentinel dark star is adding tower damage so Im less excited about that one. So Ill be looking forward to your game to fill that void. Keep up the great quality and work. Take care