I like it. The progression was steady throughout. Putting the player in puzzle room to figure out a mechanic to then releasing them into a more open world flows quite smoothly in my opinion. However I do think that the open world portion felt better to play as it wasn't just a bland room. In the puzzle you also didn't turn the camera as much. I also think that putting bottomless pits in your world after you have just completed the quite tedious task of getting out of the box is pretty devious even if I didn't try to see what happens when you actually fall in. I think the assets you picked mostly fit well together apart from the really bland floor and the randomly t-poseing mage in the skies, which I believe was put there to show your true size but then still it's weird how he is just floating there.