F1 on keyboard and up on the d-pad if you're using controller will go fullscreen
Cool, didn't notice that! Unfortunately, the performance is not great in fullscreen, and it seems like the game is designed strictly for 60 FPS (having lower value makes blob jump much higher and fall through switchable platforms sometimes).
The part I was stuck on was a bit after that one, it was like a couple of slides where you need to fall through, and then turn the bottom slide into a jumper, than jump up through a tower with small jumper steps into a jumper balcony, where I was supposed to slide in the balcony, and quickly jump through the another slider just a pixel above my head, while deactivating it, and reactivate it in time to deactivate a moment later after the spikes at the end of the balcony slide.