Very cool game, idea is neat, visuals and style is off the charts. Though the scoring system is a complete mystery, I happily avoided rings as it looks just like obstacle at my first runs. In general there is some lack of cues on when to jump, also pressing a button to "interact" not knowing if it jumps or ducks is somewhat disorientating. I think this idea can be polished into a very interesting game, especially if elderly form gets some gameplay importance as well (now it's just worse than mid-adult in every way). Tutorial screen with all animations is great, I liked that a lot. Congrats on submitting a very cool entry!
P.S. There's a bug that won't allow you to play after restart (mouse not registering), had to reload the page. I suspect you don't have EventSystem saved in Scene in Unity, so it appears on game start but not on SceneLoad (not sure but may help)
P.P.S. Fullscreen buttons overlap. You can hide itch's button (it doesn't work anyway) and increase size a bit to reveal Unity's button. You can do it now, no need to wait until voting closes.