@ everyone: The game is a vehicle for the story, I can't believe nobody noticed but every level is the same. It does save your progress, haven't you noticed how the chapter selection screen keeps track of finished chapters?
Yes you can run through each level really fast, and then what? Was that fun? Did you "win"? If you don't have time to read maybe you should stop for a second and finish reading before continuing.
to deadfire:
Pretty good getting to level 4, I made the game and rarely make it past level 5. Cavemen Hunters was designed with multiplayer in mind, it's local though so you play with your friends on the same computer using one keyboard.