1. Allow the user to click an 'accept all' gift button as I see no disadvantage in not accepting any gift. I usually send the same gift to everyone first and then have to go back and click on each 'accept' gift button.
2. Maybe add in a new stats option called 'luck'. If you put points into it, your luck goes up. this could give you a better chance in getting better items from boss fights, do a critical hit in any fight (boss or versus user). When user A attacks user B and user B has invested in luck, then user B may have a critical defense that reduces user A's attack power.
3. underneath the health bar and below the 'heal' button, add in the timer so I know when the next health point will be added. currently, it's only for energy and stamina.
just some suggestions.