I also struggled to attack and kill anyone. But I did enjoy the simple look and feel here and I'm in a mind to make a simple top-down game for my next jam entry .
Just a tip for next time, very few people in these Jams play games that require a download, and you'll not get many reviews unless you play and review lots of other people's games. Submit an HTML5 entry and you'll get more interest.
I learnt this the hard way my first time around!
This time I've been forced to make mine a download because the HTML5 export on Godot 4 is so poor. But I'm trying to learn 4 so it was a good opportunity.
Anyway, this wasn't a bad entry, but do work on the attacking dynamics and make sure you nail the essentials in your next jam