I like the idea that stronger items can burn up, it fits the theme in a very creative way!
I could not purchase any item, or select any option (item or enemy) that was not on the far right, if there is a way to choose the other options, could you put the controls in the game somewhere?
Each run the enemy killed my character in the first fight, so I also recommend tuning the difficulty a bit.
It would probably be better to specify where your assets came from rather than just stating that none of them are made from scratch, these days people are looking out for gen ai so that helps perceptions.
I think with more polish and less bugs this would be quite fun, nice concept!