Great job! I think some of the ideas (like switching weapons and dropping light sources) were a little half-baked but could really shine with more time. My best piece of advice is just to keep doing more of these jams. At the start you'll be more focused on trying to figure out godot than trying to figure out your game haha but once you get comfortable with it you'll be free to spend more time fleshing out the mechanics. Solid work though, very impressive for your first game.