Great concept, ruined by horrifically laggy animations that take forever and can't be skipped. (also, blue and purple REALLY need to be switched on the color wheel. Makes things really unintuitive.)
Not sure why the continue-dialogue and the interact needed to be different, since you only need one or the other for any given thing. Story was sweet, though.
Hellaciously difficult but very rewarding. For the full version I'd suggest having some way to "lock" tiles you're completely sure of and reset all *except* those, in addition to the reset-everything option.
When you play just enough standard mode to unlock challenge mode and have never seen half the games that challenge mode doesn't tell you how to play...
Check in the graveyard menu