Fits the theme well- I like the notion of one weapon and having to go fetch it. Reminds me a little bit of Titan Souls, where you have one arrow (but you can also press the attack button to summon the arrow back.
I think there are a lot of opportunities for polish, but the main mechanic and risk factor are super clear. And my reaction when finishing the first level to the second LOL. I would be curious to see where you would have gone with this given more development time, i.e. how to incentivize continuing through each level fully.
Nice!