If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Run as a caveman & avoid obstacles & T-Rex. Control the pterodactyl with your mouse to grab gems.
A,D or Left and Right Arrow keys - To move.
W or Space bar - To jump.
S or Down Arrow key - To slide.
Mouse key - To control pteranodon by collecting gems.