Cool concept for a game about scaling objects, though I got really frustrated with the green box stage and stopped playing there (skill issue perhaps... I tried different approaches as well), not sure if it would make the game better but it could use a front or side view to check on the sizes of the cubes, just to know if I should add a touch to the scale or not.
The character rotation to the direction could use some work as well, though it isn't really game breaking, just feels weird jumping front while my character is looking backwards (hope I made that clear ^^).
Other than that, awesome vibes, love the music and the fact it loops, each feels more bopping than the last, also love how difficult it may be, rather than simply pushing blocks to the right size.