The game is very fun, one of the best prototypes by far.
The bat swinging mechaninc is very similar to Enter the Gungeon's "Casey" weapon and I think, if tweeked a bit, it can feel as good as that if not better. 2 things that concerned me while playing: controllers and repetiton.
For the controllers: the mouse and keyboard work well enough but on gampad, I can only control the character's movement. It would be awsome to heve the rest of the movement adapted to controller because I believe that would fell more confortable
For the repetition: If you only have one weapon and 4 different types of enemies, the game can get stale. Maybe adding more stages or enemies could make the game engaging for more time. Honestly, the bat is so satisfying, I only need an excuse to keep using it to hit new goons.