Extremely fun! I'm having a blast. Finally managed to beat the all of the levels. It's challenging, but easy to understand.
Like other people have said, the only other two bugs I've encountered are instantly getting booted out of a sublevel (it's never the shop that boots me out) and getting stuck in unbreakable blocks at high weights. I've also had it generate levels where unbreakable blocks are in an almost horizontal line and there's only a two space gap that my character is too fat to fit through. XD It'd be nice if in the future there was a way to restart/regenerate a level if you get stuck.
Other than those minor complaints I really love it. I'm having so much fun playing it.
Also, the belly jiggle animation on the main character is also so cute!