Great game overall and super addicting!
Things that I noticed that might need looking at
-Demolitionists are either too OP or all other towers are just weak end game. That or maybe damage from other sources are registering as demolitionist? Not sure, but they are doing 99% of my damage end game.
-Costs for upgrades are about 5% more than advertised on some upgrades (scientist discount not working?)
-When I bought cluster pick for the first time I had to reload my game due to an insane 1 fps lag, but didnt lag again until far into late game
-Maybe needs a tradeoff upgrade where theres a lower chance to have stones fly out at the cost of turret attack speed or stronger stons to reduce amount of objects on the screen at any one time. Mainly to reduce lag.
Easily this game is one of the best incrementals on the platform and if you can tune end game just right, you will make it even better.