Description taken from PC version of this game

The Humans transports you to the dawn of civilization. Through a series of coordination-based challenges, the player must control a band of humans through ever increasing levels of difficulty and various stages of evolution. It's a dinosaur-eat-dinosaur world and The Humans' success or failure in mastering new survival tools will determine how far up the evolution scale mankind climbs. Reminiscent of Psygnosis's Lemmings, logic and coordination play a large part as you advance from screen to screen and are rewarded with a "level" code allowing re-entry to the game at the current level of progress. The game consists of eighty timed levels of play with three possible skill settings for a total of 240 challenges. The Humans provides both joystick and keyboard interfaces and a unique soundtrack. It's up to you to decide mankind's ultimate fate -- evolution through survival or extinction through ineptitude. ~ Michael L. House, All Game Guide