here is my game
Nice game! Rated (✓▽✓)
Random opinion:
I think can try using Cinemachine for camera, it's pretty flexibble and easy to use. Using existing assets is also a good practice for jam, so you can concentrate on gameplay and core parts of your game. There are a lot of free assets that may suit your purposes.
Some bg music would be great.
I'm not sure if you just changing Y coodinate of your char to move him up. AddForce ForceMode.Impulse might look better.
Everyone in this thread correct me if i'm wrong (ㅅ´ ˘ `)