Personally, I'd like breakable walls, bridges, and those annoying floating ramps (check out atra, it's all those) but also Gunpowder barrels, (PLEASE BE ABLE TO PUSH THEM AROUND) and turrets, (maybe a supply?) and finally maybe a super-supply, a FLAK CANNON. (turrets and the flak will have health) And several different types of turrets, like all the guns in the game, and you are able to set it up when you first place it down. (the flak is only like thunder.) and finally, MAYBE pressure plates, buttons, levers, laser sensors, etc. to activate moving stuff like walls and bridges (squishing wall traps, anyone?) Anyway, cool idea! :)