Metal Mech: Man & Machine is a poorly-designed platformer. It has some similarities to Blaster Master: you play as a red-suited man who can pilot a larger vehicle in your quest to destroy aliens. In the first five levels, the mech is usually abandoned in favor of silly-looking bunny-hopping through the levels to get a key (the circular icon with a red K) and reach the end of the stage. The last level features a giant blue robot that flies through the level and fights the Alien Queen at the end.
Note that there are sound glitches, so there is no music during the final boss fight and credits.