First off, I love this idea. This simple mechanism for movement is interesting and intriguing and I can think of a hundred ways to expand upon it. Nicely done. I have only two real issues, which I'm sure you would have gotten two had you more time. The first is that the characters arch doesn't match up exactly with the arch that is drawn on the screen. This wasn't a big deal once I figured it out, but is kind of just a quality of life thing.
The second issue was that there doesn't appear to be a real limit on how far you can launch the character. This was funny and not a major thing either, but just something I thought I'd point out. If I could keep dragging my mouse, I could keep extending the distance the character would launch.
Love the art and aesthetic too. I could get into this one.