While the game's illustration cover resembles more like the dark Mirage comics (Darker foot soldiers, turtles' over-sized headbands, serious looks and lack of pupils), the actual game is taken straight out of the kid friendly cartoon series (from the late 80s/early 90s) and thats usually the format of almost every Ninja Turtle game ported into Nintendo and this release was no exception.  Even on hard mode, the game is very simple and short.  With the turtle of your choice, you plow your way through several foot soliders, mousers, and roadkill rodney robots plus avoid a few obsticles while you make your way to the Technodrome and Krang and save your friend, April O'Neal. Unlke the TMNT games on the larger consoles, there are only five levels and five bosses (Rocksteady, Bebop, Baxter Stockman, Shredder, and Krang) so my only gripe was not providing a few more levels thus not adding a little more of a challenge to the game.  Because of the game's success, Gameboy allowed Konami to make a sequel with a bigger challenge and more levels/bosses (TMNT II: Back From The Sewers).  Other than the limited challenge (probally to target younger kids while the game's cover art is targeting older kids) its a fun adventure fun and slash game that great for all ages and its timeless.  Grab your gameboy, this game, and a pizza and rock on!!