Played the first two puzzles in browser on desktop.
What landed: the tall/wide asymmetry is instantly readable once a piece moves — I didn’t need the blurb to “get” the joke of the characters. Puzzle 1’s goal (“long side on the enclosure edge”) clicked after one failed shove into a shrub; the fail state taught the rule faster than the text did for me.
What snagged: before that first fail, I briefly tried to rotate (habit from other block puzzles). A one-line “no rotate / no squeeze through shrubs” under the board on level 1 would save that dead second. Also on mobile-width the Japanese/English toggle sat a bit close to the move affordance for my thumb — not broken, just easy to glance-tap.
Didn’t finish all 10; stopping after a couple as you asked. Happy to poke a later level if you change the onboarding line.