Jumping Jack is an action game where the character, Jack the Koala, jumps around a level collecting as many coins as possible; he must reach the goal flag before time runs out.
Collecting timer objects gives the koala more time to explore.
Some of the surfaces in the game are jump-through platforms, which behave like solid objects except that the koala can jump up through them from below and land on top, or fall down through the platforms from above.
There are also springboard objects, which launch the koala high into the sky if he lands on them from above.
Finally, there are lock blocks, which may come in many colors and are impassable until the koala collects the key of the same color.