Movement feels good, level 1 puzzle gave me the idea about how game works so good work on teaching via the gameplay.
At second level character gets stuck here and can't move anywhere, i've also encountered same situation in other levels where character stands in the corner, because of this i was unable to play most of the levels:
I'm playing it in Opera GX browser, there's weird inbetween tiles wireframe glitching going on, idk if it's browsers fault or not.