Heroes of the Stone Age is a simple but fun platformer.

It follows an extremely simple storyline through a couple dozen fairly linear levels.

The gameplay is pretty typical Mario-style platforming (with the interesting addition of stone-age weaponry).

Controls:

Arrow keys: Move/Jump
Space: Use weapon (if you have one)
Control: Change Weapon (if you have more than one)
Escape: Return to main menu

No install needed