The objective to go without missing for 3 levels is really easy once you get enough starting money, just buy a couple turrets and let them take care of it, just dodge and pop a pistol shot every now and then
Definitely has sticky control issues, I am releasing the arrows and he still runs. This is especially painful in the first section of the second butcher level
Yeah theres definitely a memory leak in this game somewhere, it was running slow as anything yesterday, and now after restarting it is running at a normal pace
Major problem with the balancing of the game is that the special units are almost NEVER useful because of how expensive they are. As much as I want to use a necromancer, I can't bring myself to do it because of how long it takes to build one, and then how much longer it takes for it to actually deal appreciable damage
For more functional elevators, try making your elevator shafts only go up a few floors, and then start a new shaft one column over, this will allow you to have more active elevators, while not having a million shafts