two bugs i found: by sheer lag you can have multiples time the same tower (got two shrink rays on level one and two, but i think if you do well enough you can have on all 3 any tower), and the other one is just visual but if you place a splitter, then get the buzzsaw upgrade from the gb shop, they will be invisible. (ik you on't work on this version anymore but it is for the full version)
btw im sure this will turn into gd 2.2