pretty cool game items in shop are kinda annoying though get maybe 1-2k per lvl and need 100k just for a common item crafting is the only option for gear for me atm
Points that had me rate 5/5 the complexity of the upgrade paths. The large variety of creeps which in turn force you to chose very carefully what you upgrade and how you upgrade. The various modes you can unlock. and just the theme of the game (since I love bubble tanks :P)
 "Sky Quest"){kind=icon}
 "Bubble Tanks Tower Defense 2"){kind=icon}