Thank you so much for the feedback!
You are right, different weapons deal different damage, knockback and have different attack speed. It's very easy for me to implement new weapons but I might redo the whole system post-jam (Will start working on an update tomorrow and push it when the jam ends). I got mixed feedback for the combat system because it's pretty bland right now I'd say but like I said I will keep working on improving it.
I'm glad the game was engaging for you and that you liked the boss fight. I have never made a game like this, let alone a bossfight, before, so hearing this really motivates me! :D
There are a couple of bugs that I'm aware of but I'm glad they aren't that game-breaking and you didn't notice them too much. Again, thanks for the nice, thoughtful comment!