Thank you so much for playing and the really great feedback! I'm glad to hear that you found it more engaging than some auto battlers, I wanted to give the player as much agency as possible without forcing them to interact more than they wanted to.
You're absolutely right about the weapons, I've come up with what I hope is a better system for the future and also cut down a bit on having too many unwanted results when rerolling the shop. Making each weapon more distinct is also a good idea for me to concentrate on, ideally players should be able to tell at a glance whether something in the shop is the same as what they've equipped or not, just from the shape.
I definitely blanked on explaining that main hand and off hand weapons were a thing. (I nearly blanked on even mentioning the upgrade system.)