It was hard to understand that you could cut the tentacles and send a larger attack to begin with, but once you figure out that growing/evolving produces more, it gets easier.
That wasn't as bad as Super Meat Boy, but had its moments, the last few levels were easier than the middle ones once you figure out you can jump at the very beginning to skip the main jump.
Only critique I have on this is how small the backpack is, having to constantly leave a dungeon to empty bags ends up being counter-intuitive as you have to spend money to get back in again =\
Silly glitch, but really helpful :) when you deequip something, instead of dragging to an empty slot, you can replace with "ANY" item in your inventory, so you can put an armor in a head slot or an armor in a ring slot, really funny.
Yet another beautiful rendition for the creeper series, love the extra level on the credits screen. Feels really good to know that we can destroy emitters now :)