Color matching is used in two ways: (1) matching circles creates snakes, and (2) matching a snake’s color with the squares beneath it destroys them.
Snakes, but not individual circles, can be moved by snaking to squares of matching color.
The goal is to score as highly as you can. Destroying all the squares is not required for your score to count.
The more links there are currently in the grid, the more points you get when you destroy a square.
Of course, there is more to it than that as you will see.
Try it out: https://testflight.apple.com/join/mJXdJavG
Any feedback would be appreciated! Have fun!