FAV'ED
God forbid someone does an actually challenging puzzle game am I right?
Any-who, it's pretty clear to anyone who passed level 19 that big levels like 20 are going to need some optimizations, I'd assume it's going to be patched or has already been worked on. (Or 10fps gameplay only happens on my PC somehow)
Apart from that, Newground achievements might be cool to see, but makes sense if you don't. These are really nit-picks because everything else has my 100% approval!