Your mission in this puzzle game is to help prehistoric humans to evolve by helping them find tools like spears, clubs, rocks and other items or help them to reach a hut at the other side of the screen. You will be given certain number of human characters with whom you must accomplish the task. You can also switch from person to person with mouse or keyboard. Characters can now throw rocks, spears, jump over small gaps and kill animals or hostile tribe members.
There are 8 worlds and 10 levels in each. Every level offers three goals and has a time limit. If you complete all three tasks, you will be rewarded with gold medal. Complete only two tasks and you will get silver medal.