Well there is multiple pathfinding algorithms to pick from but A* looks to both be efficient and getting the shortest distance. Here is the pico-8 cart that shows it off. I'm trying to read the code but I get lost with everything going on.
As for menus I'm planning on an inventory screen. I want to move items on the list around, equipping, dropping, ect. My previous game was in gamemaker so I was able to do it by storing each menu screen in it's own function. With Tic's limitations I just want to see if I can make it smaller.