Jumpkins

Forres Jump and his gang of flightless insects want to reach the small island in the pond by using sophisticated jumping techniques. To this end, they decide to hold a contest: Who will make the best use of the different take-off positions for the Jumpkins cubes and, with skill and a bit of luck, stack up with as many of his fellow members of the species as possible in order to form the tallest tower on the island? —description from the publisher