In this game not only the order is important, also the rate at which you execute the sequence of movements. It's not easy! You first let the gorilla to dance, paying attention at all his movements and their rythm. You then have to imitate his movements at the right time: if you do it well you'll see a green arrow. If you do it wrong, a red one. But if you do it partially good (right movement, but too early or too late), you'll see it yellow or orange, respectively.
Press the 4 arrow keys to reproduce the sequence of movements from the gorilla. The colors indicate you if you're doing it good and if you're in time: if the arrow you press looks yellow, you did it too early. If it's orange, it was too late. If it's red, you missed the key! If it's green then you did it well... and it's not easy to do it!