Sandboxmode
Also it would be nice if one could speed it up a little bit because if youre testing combos or smth like that it takes a lot of time

Moreover, there could be a little box outside the map that tells you how much all of your towers together are worth !
Just want some more data

Edit: And a little box that tells you how much money you spend for alle the creeps on the map ! This will be nice for the Endgame-Tactics