Got filtered at the mushroom section. While I managed to get to the upper level - falling from there straight back to the mushrooms is a huge pain. The gimmick works well enough, but I found myself getting screwed by not having enough time to cling to ledges. After 30+ minutes my brain still couldn't process that I needed to kinda invert the direction of the stick to move in the desired direction. I did learn how to throw myself far, but at that point in the game mistakes were so punishing I just couldn't take it.
It's polished, but it's a rage game, so not really for me.