Needs a button to hold and then click items to just sell them, way too tedious to sell an almost full inventory dragging back and forth, otherwise, fantastic game!
the only way to kill a boss that can sustain the 2000 dmg that is maximumly possible by meteor spam is to get them freezed by crypts, then they dont go invisible, so for level 14 for example, make sure that the first tower to hit all bosses is a crypt (preferrably upgraded to fear to confuse ninja's that dont freeze) rate this up to keep info alive
I just want to point out that if you are at a high level and are sure that you will survive the wave (or aren't going to be using spikes ect.) than you can just minimize the window and the game stays at its normal speed (that is to say the speed that it would play the game at if your computer could handle it without any lagg and without the speedup button) to prove this just try having the sound on and doing this, you can instantly hear how the pops become way more frequent. I am sorry for such a long comment but hope this helps.
im getting so nuts building my bridge over and over again in the challenge (its stable enough for me to be sure to win 40m with it) that im starting to think child slavory is right!!
argh this kills my patience!