Very cool little project. Awesome that you managed to finish it in such a short time. Feedback:
1. Make the objects on the ground like the rocks and stumps have the same shader as the player, or introduce some way to see objects behind trees easier as it feels unfair to run into a stump you couldn't see behind tree leaves.
2. There are some performance issues on PC, not sure about mobile. Might have something to do with the level generation?
3. I found myself wanting to speed things up and get a little risky with bumping up my score. A couple of ideas I had while playing to introduce something like this would be to allow the player to swipe down to run faster for a while (or arrow key down on pc). Alternatively, you could enter a "frenzy" mode after collecting a certain number of coins or introduce a new pickup like a hot pepper or something.
I managed to make it to 167 score after playing for a few minutes or so.
A good bit of fun, keep making projects and you'll be making projects as a studio before you know it!