Dumbow & Cool is far more the former than the latter.
It stars off innocently enough. King Lecture, the big evil head of LLC Oil Rig, the big evil oil company, fires all his workers and attempts to get slave labor in order to turn a net profit. The oil company goes to where Dumbow and Cool live, Happy Valley, and capture a number of the inhabitants, Shmumps. Dumbow and Cool's job in the game is to save their fellow islanders. Also thrown in, as an added necessary task on each level, are a bunch of blue coins for them to get.
Each of the two characters have slightly different special abilities. Dumbow can throw on a snorkel and mask and swim, whereas Cool can roller skate. Of course, each of these abilities prove essential at different points in the game.
The game itself is a 3D platformer, with simplistic, if annoying, controls. It starts off fun enough — the first level takes you through, step-by-step, how to control Dumbow and Cool. The player gets to see how to free the captured Shmumps and get the blue coins. By the second level, with the controls figured out, the game seems fun -- skating, swimming, avoiding the evil Studes, and generally doing good and helping make Happy Valley a better place.
By the fourth level, it all starts to get old. There are new obstacles and challenges in every level for the player to figure out, but they're either too easy or simply obnoxious. The control scheme is far too finicky, causing numerous unnecessary deaths of Dumbow and Cool simply due to its awkwardness and overly sensitive nature. After a few more levels, it's just tedious and annoying.