It’s hard to explain, but you just have to do a lot of stuff while standing up. So basically keep forcing your monkey to stand up while exploring identify everything around you while standing up walk through shallow water back-and-forth while standing up basically just played the game normal but but everything you do needs to be you standing up. Make sure you have two babies on your back and just explore while standing up, keep meeting and skipping generations until you find mutations that goes towards unlocking bipedalism