1. End Dialog (I'll take my leave) should be an extra button, like the shop button. In the conversation Dialog
2. Quest Items that have a single purpose should be deleted when successfully used and are not needed anymore
3. Rats are too fast.
4. Add dual wielding to the game (e.g. two daggers)
5. Quick stack button (stack all items into the container already containing them). See Terraria for an live implementation.
6. Add specialised crafting containers. These should hold any number of certain resources. See Guild wars 2 for the crafting container:
(the cooking ingredients are all shown, the ones owned have numbers on them, that way they are always sorted and taken care of)
7. Crafting in the game should't be implicit. Sometimes i draged items over each other because i wanted to stack them, instead they got combined. Kinda bad when you didnt want to have them do this. => build a crafting interface where i can combine items explicid.