Things to improve your game:
1) Variable and lvl based shops stock. Itens changing every exploration. Would be great if had option to lock and item (if you wanna it, but dont have money now).
2) Increased speed of the character while exploring. Like 1.5 or 2x faster.
3) Option to increase the battle animation and, if possible, skip it entirely, seeing just to the results instantaneously after the attack (good for slow PCs and great to make the game quicker).
4) A buttom to "resolve battle using normal atttack". Just to not loose time when you know you will win easily.
5) Two rings slot.
6) Buttom 1, 2, 3, in the battle, to use heavy, normal and light attack. This is specially useful if you enable skip animation on battle.
7) UBER-IMPORTANT: Use of heal magic outside the battles.
8) Different storage chests. Like 5 different places, so ppl can put potions, armors, weapons.
9) Possibility of sending one or more itens for your other save games.