This is just a brief note on my participation to the challenge. The game developed to that end is a 3D remake of the original frogger concept and has been made available as an open source product under the BSD (3 clause) license.
It is a small casual game, in which the player is controlling a frog. The frog has to get to the other side of a road, avoiding passing cars, and a pond in which wooden planks float. The cars can crush the frog and, if it fails to use the planks when crossing the pond, it drowns …