Great game, good art and animation, interesting (and maybe fun) gameplay.
I will point out however that the gameplay is more of an elaborate puzzle centered around each stages gimmick, and understanding the role of each monster. The fun and challenge of this game comes more from the solving of this puzzle given very limited information, it is enough information though.
Worded around this topic but here goes:
Anyone who says the gameplay is trash simply didn't take the time to stop and think about what they were looking at, but also, said people didn't expect a puzzle game; and such a genre is for a specific subset of people, so to each their own I guess(I enjoyed it, and got each star).