If I've learned anything from making a platformer, it's that you need to be more generous with your jumps than you think. I pretty much camped the bottom because it took too long to line up and make a jump up to the higher platforms.
I also didn't understand the perspective of the map until the enemies started spawning. It read top-down to me until I saw enemies walking along what I thought were walls, and even then my brain had trouble parsing the map sometimes. Slapping a lighter or darker color on the material for the sprite renderer/tilemap renderer for the background/foreground elements can help sell depth a little easier without costing you too much time.
Still don't quite understand what placing swords does for me. Maybe explain in the description?
For all my fussing, I rated this pretty darn highly. It's super polished and does what it's supposed to. For the time frame you had this is a really impressive piece of software.