You should be able to upgrade specs for the raiders.
Warrior: Upgrade Health, Damage, Attack Speed, Crit Chance.
Ranger: Upgrade Health, Damage, Attack Speed, Crit Chance.
Healer: Upgrade Health, Heal Amt, Cast Speed, Damage.
Suggestion: When you have an empty space(or even not) if you mouse over a block, it'd be nice to see the total cooling capacity for said space.
So let's say I have a Quad Dolorium in a spot...I want to see with my upgrades if it can support a Double Nefastium Cell... it should say "Total Cooling Efficiency is: X". I can then see how much the Double Nefastium cell generates.
I find that when you need a specific hero for a sacrifice, they are almost impossible to get from the tavern. When I don't need them, they pop up all the time. When I do, it's beyond rare. I have spent $50k+ trying to get a Carnifex. I would suggest that when you have ANYTHING that is capped, it puts a more likely chance to roll.
Bugs / Suggestion:
Bug: In the barracks, and you're looking at the hero (with their stats), you can NOT click the left arrow.
Suggestion: Either A: Increase the energy count, or B. Decrease the refill timer. 10+min is entirely too long. I'd recommend about 3-5min.
Options: I would love an option (or have it remember) the last camera view I was in. It's kind of annoying to click on the camera view at the start of every game.
To the Wobbly Tower Players. Not going to lie. I didn't mean to publish this quite yet. I was hoping to have the new 3D models as well as the multiplayer finished before I did. So... I'm sorry. In the mean time.. Enjoy the game.
 "Idle Raiders")
 "Epic War VI")
 "Slap It!")
 "Reactor Incremental")
 "Party Of Heroes")
 "Wobbly Tower"){kind=icon}
 "Zombie Outbreak Simulator")
 "Bloons Super Monkey 2")
 "Driving cars")
 "Sands of the Coliseum")
What would you suggest to make the game better?