Once past all of the login stuff, this was a nice simple game. Personally, I'm not big on signing up for every random thing I try, so the login almost had me stop right there, until I saw the option to continue as a guest. With the blue water in the background, the white and blue text can be a bit hard to read. It would be nice if you added a shadow or outline to the text to help add some contrast.
The game itself played well. The single button play was nice, though took some getting used to, especially when the path changed and I instinctively wanted to move the mouse to a different position or do something to turn the piece. Knowing the instructions it was just a moment to reorient my thinking, and the simple play did work well. After a few tries I started to get a feel for how to make the jumps, though I feel like I was largely relying on the sound. It would be nice if there could be a bit more clear visual feedback. I feel like the movement of the piece as it is charging the jump is not as easy to tell how much it has charged compared to timing off of the sounds. The charging sound is really good and has enough variation as it progresses that I found it really useful for timing my jumps.
I played several times and my best was 17, with several of the jumps landing close enough to the center to get the bonus point. I lost on a longer jump, which I am still working to get my timing on. It does feel like there is a point where the distance jumped increases more per second charging, though that could just be losing track of my timing.