Although this is a simple entry, I actually think there is some potential here if you ever decide to continue working on and fleshing it out. It has the feel of a physics based "clicker" game, which is pretty interesting. Just an idea: I think if you were able to detect mouse vs touch, you could apply a kind of internal warping effect on the actual click point within the ball when the user is using a mouse. In other words, apply a scale factor that pushes the actual click point away from the center of the ball from the point the user clicked, with the factor increasing logarithmically the closer they are to the center up to a point, thus requiring more precision the closer they are to the center with the mouse. And then maybe randomize the starting position of the ball just a bit, and have it always fall from the top of the screen instead of starting at the bottom.
I'd suggest some minor tweaks to the twitch.io wrapper page to be more responsive, and to center the vertical play space when in fullscreen.
Some simple sound effects and music would enhance the game a lot with just a little effort. Sounds like you're going for a comfy casual game, so maybe some gentle soothing music with a subtle "kick" and "bounce" sound would be great. For the sound effects, I'd suggest recording or creating a handful each and randomizing which one plays for a more "natural" sound.
Some ideas for future enhancements: you could turn it into a full clicker game, with powerups you can buy to make it easier, or obstacles that make it more difficult to keep kicking the ball the longer you last.