I like the idea of the game and I like when puzzle games give you a more open structure so there are multiple ways to beat the same level.
It would be helpful if the game told you where the pieces are gonna be once you move them (like in chess apps) so that you don't have to count square by square.
I did experience some bugs when I tried to click on circles that couldn't move towards one another. Every one of them showed the heart particles and when I finally did a legal move many of them moved at once in unexpected ways and I had to reset. This could be fixed by making it impossible to select more than two circles at once.