Some problems with it
Magic is nearly useless. I only found 2 spell so far. We should get some mp-heavy yet effective spells like light heal or a small boost to attack power, permanently.. or "artifact-class" spells that follow us around.
Healing items are innneficient and extremely expensive.
Mana doesnt regenerate
Giving too many items at the shop detroy the items, permanentyl.
Otheerwise, the game system is solid and simple. Good job, but it still needs work.