Honestly, after some thought, money being as sparse as it is makes for an even better experience. I'm able to buy at least one thing whenever I encounter a shop but never everything, and that extra choice is more interesting than the usual RPG experience of having so much money shops are just places you're able to pick up everything you need and then some. Not having healing items in shops also makes them feel important to use and saving items feels like a necessary habit to have learned - unlike other RPGs where you can just buy more potions before going into a dungeon.
I've read other comments so I understand why you aren't charging for this game but I honestly believe that without the copyright issues it really is worth paying for. If you have a Ko-Fi or Paypal or Patreon or anything I genuinely want to pay money for the experience I'm having playing this game.