This is a game that involves taming dinosaurs. It was created for a hackathon on Gamedev.net, and it has a lot of polishing that could be done. Conceptually it was going to have different mini-games, more types of dinosaurs to tame, maybe even a flying tridactyl across the cityscape.
My brother was playing a different game recently and told me it was as if I had finished this out without dinosaurs. So, if you try this you may know which one he was playing.
To run the game, Java is required. If you do not have Java, please download it from the official java site.