You're trapped in a temple, and something is hunting you. Find the three sun stones — look for their beams of light — then get out through the gate.
The monkey runs by himself. Swipe left or right before a junction to choose your way there. Swipe down to turn back. Run into a dead end and he turns round by himself.
The map shows the stones, the gate and the monster. When the edges go red, it can see you — get round a corner.