What a wonderfully polished and smart game! I love how much depth is achieved from an initially simple premise, and how skilled the levels are at tutorializing the key mechanics ahead of puzzles. It definitely took me a second, but a big "AHA" moment when I was stuck on the second resizing-bumping puzzle with gap and realized I'd just nudged other blocks. I also love the simple art style / music combo - a lot of polish achieved by sticking to that. Nicely done!