there should be upgrade options at the end spending points you reached. i.e. fasting the bar charge, more dmg to balls or to wizards/archers, to improve the number of them and so on
At the moment the production il about Xe14 - e15. To get prestige i need Xe20 so approximately 30-40 hours per point.... i need 500 hundrends prestige to complete tier 4, knowing that each 10 prestige gained the price doubles i think that in one hundred, maybe tw hundreds years i can complete them :D
Put some upgrade.. for example: a the end of mission give some point to spend upgrading towers or to unlock permanently towers. Give those points related to max level reached so if you don't go over your maximum level you will not take them again.
Thanks for the feedback, think about how boring a game can be if you can CC /stun lock every enemy. In my humble opinion bosses and some enemies should be immune to cc, or it will render the game too boring, by the way, all CC spells still can be source of good damage!
 "Orcs VS Elfs"){kind=icon}
 "Pixels filling Squares DX"){kind=icon}
 "Rogue Tower"){kind=icon}
 "RCM"){kind=icon}
 "World Idle"){kind=icon}
 "Formula Fever"){kind=icon}
 "Rogue Legend: Tame the Wild"){kind=icon}
 "Champions Of Chaos 2"){kind=icon}
 "Demons vs Fairyland"){kind=icon}
 "MARDEK RPG: Chapter 2"){kind=icon}
 "Enigmata: Stellar War"){kind=icon}
 "Medieval Crusade 2 Online"){kind=icon}
 "Pirates"){kind=icon}
Oh, sorry, canteen needs the tinker table, not anvil