Why can't I change the resolution? Seems weird with how big it is. The down key doesn't work as well for doing through certain platforms. Other than that, you are good. But I really enjoyed the gameplay. It's like sonic and an older android game combined into one. Music and graphics are really good. Keep at it, but I would recommend slowing down the pace of introducing new mechanics, it gets overwhelming for new players and they need time to learn and to experiment with what is given to them.
I do think you have a really great base and you can make a really great game with it. I'll probably buy it when it releases desu.