This is very strong work. The UI is nice and responsive. The controls feel good and I appreciate the sane ZX+arrows default. The tiles look nice and are cohesive and the colors pop. The core gameplay concept is unique and fun and offers a surprising amount of depth. My only issues are that when changing size, the final position of your cube can be a bit ambiguous, I think staying rooted to the floor when changing size might be more intuitive. The other issue is not a huge concern but I wanted to mention a bug I ran into on the third stage (iirc) where increasing the size of the player cube caused it to clip through some of the floor tiles, I didn’t get stuck however. Really nice job on this, will follow your work in the future!