Really lovely art! This has potential, I definitely think zooming out the camera and maybe taking inspiration from Sonic style levels would be a great place to start improving things.
Also, having the boulder actually roll around would really sell the game feel (you can do this in Unity by decoupling the sprite renderer from the player GameObject, and putting it as a child of the GameObject, so you can handle animation without it affecting your movement)!
Hope you folks get well soon if you're still recovering - nice entry!