The demo is excellent, as I tought. I first have tested the beta demo a long time ago, but it was buggy and really unenjoyable. But without bugs, I really enjoy this game. The only problem that I actually see is that there's some cringy sounds, like the checkpoint sound. But I enjoyed the demo, and my favourite part is where we have to break question blocks to go up and then bounce on ballons and gather wood and arrive with the bricks chamber and the cloud where we can walk. Also I think you should add DKCountry barrel level parts, it's one of my favourite 2d platformer mechanics in video game.