In general, i had fun with the game. I think it is cool the way that as you go through, you actually are not only aging with the number but also with your body. I wish the day night cycle maybe did more though, it is kinda just there.
Bugs: Ages 3-15 (i think), there is a very easy double jump if you just double tap, maybe other ages too. Also, sometimes you will just land on the floor wrong and just kinda die.
Features: One thing to make the game better would be if the obstacles were more age appropriate (Get it..). Having baby stuff drop until 5, then maybe video games and skateboards, etc.. Could be a very nice touch to the game! Also, i feel like the potions are kinda useless, they dont seem to de-age you all that much, granted, i always collect them and died trying a few times!
Regardless, i had fun and i think this could be very cool!