How to fix the turret tower problem

[bowpro]

I am going to send a new Threat, that the time of the game tower defense is too short.
I tried to level monsters up, but the game was over too fast.

 

[Miauw]

I like the idea of this new troop! I only think the price should be a little bit less than it currently would be now, because 12 endermen at level 5 would cost 13,500 coins, while they could still be stopped a lot by sorcerer, artillery, quake, ice, necromancer, zeus and mage towers.

Not to forget that spiders at level 4/5 already are invulnerable to a lot of towers including turrets, but still don't make it that far once your base has a lot of variation in towers which are fully upgraded further in game.

 

[Manchot999]

Try sending level 5 slimes.

It would be fun to have more than just one immune troop though.