Neat concept! Like a more chill "Puzzle Bobble / Bust a move". Took a sec to wrap my head around the mechanics, but once I, did I had a pretty good time! In a weird way, it reminds me of older PopCap tittles (Remix a pre-existing concept, strangely addicting, i don't know the exact term for it but the "pre-rendered" / "photograph" backgrounds). If this were to be made into a full game, perhaps a limited use "Board scramble" function would be nice? While i didn't run into it myself, this feels like the kind of thing that might become unwinnable due to shear happenstance. Then again, so can solitaire, so who knows.
Best time so far, 3:34. Something about the setup makes me think speedruns would be interesting to attempt, but I don't have that kind of dedication... I'll definitely be tinkering with it more!