List of suggestions

[Ratiotile]

Interface-related:
1. cursor should change to indicate select target when casting a spell
2. when an item fails to equip, display a message indicating why not
3. allow binding keys to [alt], [shift], and [ctrl]
4. allow copy-paste for account number (minor)

Engine-related:
1. sliding collisions

feel free to post any more suggestions here, so I can add them to the list.