Hm. I think I bought too many traps/monsters and can no longer close the window. I can't place new traps either. I also can't close the sell window. Probably too many items as well. It really needs to be a scrolling box.
The balance is strange. It feels like you just want a ton of the higher level traps and some kind of monster that regenerates. The traps are way too good because they don't require any souls to enable. The kobolds are kind of bad because they use so many souls. I like the synergies I think the game needs more of them.
Anyways it was fun. I look forward to future updates :)