I’ve started a new game for learning the order of operations (link: https://gamejolt.com/games/PriorityGame/463608)
For now it’s really rough with a minimal graphic (there is still not even a chicken!) but it creates computables numerical expressions and it helps you solving them.
However a graphic setup is under preparation, with chemicals, potions and (of course) chickens!
A QRCode for mobile devices:
Game of chickens 