launched the game from my downloads folder and had no sound, also the game hung up at character select, so if anyone has those problems, might recommend moving it (to desktop or something)
got up to level 16 after about 3 tries, can definitely see the appeal. Played on keyboard and my wasd fingers were tiring out pretty quick
The game is a bit daunting at first, but it starts to feel a bit like solving a rubix cube (following certain patterns of movement to get the right face in the right spot). If you wanted, you could probably have tutorial stages to teach some of those patterns and it might help people ease into it, oooooor they might just mash through them and not remember any of it, who can say.
art and menus look and sound great (everyone agrees)
when combo builds up to the explosion it feels like the center should be the tile I'm stepping into instead of my last one. Not saying you should move it (although you could) but you may consider adding an outline of the tiles that are going to be destroyed before stepping off the tile
Good luck!