A huge congratulations for making your first game, seeing it through to the end and getting some nice polish on it too!
You're movement controller is pretty good for a first go. I would prefer the actions to happen on key-down instead of key-up, but everything else was pretty good!
I like that you picked a simple mechanic and focused on implementing it well. It worked, it was fun and it ticked all the boxes it needed to for the jam. You should be very proud of what you've achieved. Yes it was short, but a fun game and I hope you come back next year.