I couldn't find this in the already suggested post but please let me know if this idea was already tossed around too much. It'd be nice if instead of just exiting to the desktop, there was another choice to exit back to the main menu, especially after last stand mode. Another thing I have a problem with is the skill system. Its ridiculous that you have to work extremely hard just to build a shabby looking wall. Everything should be buildable at atleast level one but as your skill increases, so does the quality of your construction. Thats my shpeal.