This is simply a hurrah to gorosaurorocks... You can click on the monsters to talk to them (except lazy Gamera)! Press space to jump! Gorosaurus will follow your mouse! Press A to attack! Press D to burrow!
gorosaurorocks for the actual game, and Toho for the monsters... I think, but the turtle dude I assume is Gamera (EDIT: Which came from the original game.) comes from Kadokawa Daiei Studio.
