Teenage Mutant Ninja Turtles: Cowabunga

Teenage Mutant Ninja Turtles: Cowabunga is a free fangame done in the style of Konami's Ninja Turtles games for the Game Boy.

Master Splinter has been kidnapped by Shredder and his goons, and the turtles must save him! Face familiar Turtles' villains and bosses through five stages of platforming action, collecting point items and ooze canisters. A limited amount of shuriken can be used to tackle far-away foes.

You can switch between the four turtles on the fly, each with his own weapon and health meter. If any one turtle runs out of health it's game over, so it's wise to keep switching between them.

Between stages you'll be challenged by a Shinobi-style bonus stage with a health bonus to gain if you hit all ninjas.