Good job! Loved the art! My score is currently at 582053 and I don't feel like I'm ever gonna lose, nor do I feel a sense of progress in difficulty. I believe if it were easier to lose and easier to get to the higher speed it would be more dinamic and rewarding. Even though I've been plating for a while, I still didn't get to the highest speed, and it seems like I'm slowed down just as easily as I speed up, but there's too large of a gap between those things happening, which could be better if stuff was getting faster.
Keep up the great work!