Left/Right arrow for moving, talk to cats by clicking on them. Click on prey to hunt it. This is actually educational. The med cat teaches you about herbs. Click on the fresh kill pile to eat, as a kit you can eat without pay, but as an apprentice, you must have some prey in your inventory to eat. Use the up and down arrows to open/close your inventory. E and Q can do it as well. So this is a custom warriors game, you can have your own pelt, and Name prefix! You can get a different pelt by clicking the flag or pressing A.
To be a med cat, on day two, talk to the leader and say, "Spottedshore".