Welcome back 2021 jammer! Glad to see you're still making games :)
Like you said, you didn't get to put as much time into this as you would have liked. The core of the game looks solid though. Random rooms, kill zombies, and a sweet bat power. A little hit feedback for the zombies would have helped. Maybe less health on them, too? And clicking to attack instead of the spacebar would have helped. Spamming space on my mechanical keyboard felt great, but sounded terrible and took way too long.
Next time make a game that's all about throwing bats at enemies. That was a very cool moment.
Congrats on submitting despite your shortened timeline though. Hope to see you in future jams!