A lovely little game, especially with this being your first and you having all the assets yourself.
If you were to develop it further in the future, I'd suggest to improve the enemy pathfinding so that they can't sense the player through walls and it may be better if the player only has to restart the current level when failing and not having to start from 0 again and redoing the levels one has already finished. But for the limited time frame of the jam, well done!