Really nice and relaxing mini game. The mechanic is really simple, although it can feel a little strange at first, but it works quite nicely. It's a bit chaotic at the start as the pieces combine automatically without your help.
And idea I had was to allow jumping gaps to swap instead of sometimes having an area cut off and having to wait for more balls to fall.
The aesthetics are pretty nice. And I like the little touch of the balls fusing together.
Well done, fantastic job!