Nice sprite-work and the smashing-up of enemies was really cool. The boss at the end was awesome!
I did find the player would sometimes get stuck on walls, to fix this you can create a 2D Physics Material with Friction set to 0, then just attach that to the player's rigidbody.
I also occasionally got stuck moving along the ground, if you're using a tilemap collider, you can add a Composite Collider 2D component. This combines all the little hit-boxes of each tile into one big hit-box, making surfaces perfectly flat. This tutorial explains it quite well.
For your first game jam this is super impressive and you should definitely keep it up! :)