This is a pretty good game here! It took me a minute to figure out exactly how everything work, but man once I figured it out my score drastically increased!
I kept wanting to move pieces up and down though, just from my years of playing connect three type games I guess hahaha. I'm not sure if that's the direction you're going in but regardless I think what your game could use most is a quick in-game explanation or tutorial of some kind. Just to speed up the figuring out process!
Otherwise I loved it! I ended up playing for a good bit see how high of a score I could get and how clear I could get the screen! Keep it up man!