The arts are very cute and really good! I like it!
But gameplay has annoying elements:
1) If I hover the cursor on the third row from the top, the arrow starts to tremble, and mouse input does not work.
2) The last color that I need may not fall out for quite a long time.
3) It's not necessary, but gameplay will be more dynamic if small groups of gems fall down when they disconnect from the main group.