i got it in 8:45 (but i'm getting sleepy, so that may have slowed me down a bit hehe). this is solid. i like the pixel-work, and nothing seems out of place or clashy. the music was well-chosen: nice and soothing to help me sink into the puzzle. there didn't seem to be any filler--every section was asking me to do something new, or putting new pieces together. i felt like every command got a good bit of use, and the combinations were balanced enough that i never really had a go-to combo.
i'll add my voice to those complaining about the player resetting whenever you put down a new block. it wasn't a huge deal, but it did get a little frustrating with some of the longer segments when i had to make adjustments, or when i was altering things later in the course and wished they could just run through the already-working parts while i did that. maybe you could detect the player's proximity to the block being changed, and only reset if they're within a certain number of blocks? not sure how feasible that is, but something along those lines would make it a little smoother in the endgame.
that's my only complaint though. this is a wonderful take on the theme and very well-implemented. those last few parts were super satisfying to solve. great work!