What a great approach of checkers ! And you can still have some strategy, where you taunt specific pieces to try to align them in a convenient way for the combos..
The effect of power-ups were interesting, but some were really hard to use strategically (for example the freezing ones) as you need to go the the corner of the board to get them, and you don't see if current piece layout is interesting to freeze.. Maybe another button to trigger the power-up once you get it could be more effective..
Also, after one or 2 tries, I ended up spamming space to the end of the game and got like 26K. I saw your highscore and thought I could think about my moves first, so I did and tried to have some nice combos, and in the end I finished at 28K... I will definitely try again in the future, as I have room for improvement !