The fact I can't open the shop until I close all other UI elements is a deal breaker for me. Makes it a PITA. Going from the state you'll likely be in (building menu open, to-do list open) to shop, then back to that same state takes the following inputs: Close building menu, close to-do list, open shop, open water, click max, click sell, click close shop, open building menu, open to-do list. That's 10 inputs for something that should probably just be at most 2 clicks. Also heaven forbid you forgot to check how many items the to-do list asked you to sell. Because then you have to do it all over again, every...single...time.