Beat the whole game (v1.1). It feels... weird, I guess. I liked the concept, but at the later stages it felt like it was less about solving the puzzle, and more about the execution. Like, I had to press buttons too many times in the allotted time, and any mistake made me lose the execution of the previous rooms - and that didn't feel fun.
A small nitpick: I'm playing at 16:10 resolution, and a the right half of the timer was off-screen.
Soundtrack changing with each stage is a nice touch, although I see there's polish to have, as sometimes the "parts" started half a second earlier than the stage switched. Also I wish there was some SFX for moving boxes - or at least for boxes getting onto the colored, uh, buttons.
I really liked the graphics, but on some levels (specifically, the snow and the dungeon ones) the boxes were hard to distinguish (at first), as they have the same color palette as the walls.
I've completed the game, and wish there was an ending screen with some simple score display, so I could post it here. π
Overall, I liked the idea enough that I'd be happy to play more, but with the timer either disabled or extended, or with a limit on, don't know, 20-25 moves per 10-second-part (from the design perspective).