Fantastic visual to this game! Reminded me of the board game Azul for some reason. Was a bit hard to visually see what value each tile had at first, but then I saw that you put some stylish numbered dots on the side of the tiles, neat! But would have been nice to have that in the help-section :)
Was a bit too easy to make accidental moves since the tile you recently used is not deselected after a move. I think just deselecting all tiles after each move would work a bit better.
Other than that, very polished and quite difficult little brain-teaser of a game! Make more levels and some QoL stuff and you could release this as a full game! Would love it on my phone haha!
Fantastic work! :)