So many people create board games, but they always want to implement "Forced Moves" to where the game just doesn't feel like there is any real strategy. That's the difference between real checkers vs online checkers. I wanna see a game where I can actually play how I want and strategize how I want. I wanna see a more IRL version of the game that I can play with many people. If you can make that happen, I'll gladly recommend your app. (I wont guarantee much traction, but it'll definitely set it apart from other checker games.)
The appearance looks really good. Fix up the few bugs and maybe add a couple of modes, do a bit of twitter advertising, and maybe, just maybe you'll get some traction. I believe in you. I actually quite liked the game from the single game I did. Make something people want to return to every so often when they are far apart