Thanks for playing and the feedback is much appreciated.
I only had 10 days to make this, so there aren't many clothing options, since I added them late into development. Also, the empty space besides the equipment screen is reserved for the character model, I just didn't have time to implement it yet.
I fixed the store now, so it should be easier to replenish your items.
The performance issues might not happen on the downloaded version. I think there's no fix for them right now in the web version. Once Godot 4.5 comes out, it might get fixed.