Fantastic game! I really like that the tower levels continue as you progress. I think that that is a very unique and fresh way to do an Idle Tower Defense game, almost gives it an RPG like feel. Just one suggestion though. I think that you should not make the "New Player Bundle" a time limited option. I think that a lot of players are very wary of spending money on a game within the first few hours of playing it. But if you instead made it a one time purchase item, whether in the store or just keeping the chest icon where it is, I think that you will find a lot more players investing money to buy it, after they've been playing the game for a bit. You've made a great game here, give players a bit more time to see how addicting it is, and I guarantee that a lot of them will want the starter pack.