A little boy called Martin is playing in the snow when suddenly one of his mittens is stolen. He soon finds a camp of elves who have had their mittens stolen too. When Martin declares he's going to get all their mittens back the elves grant him the power to float.
Marvin's Mittens provides examples of the following tropes:
- Ambidextrous Sprite: Averted. Marvin's left Mitten is stolen and his left hand is always the mittenless one, no matter which direction he faces.
- Anti Poop-Socking: Marvin has to come home before the sun goes down. I keeps the game's pace slow as intended.
- Door to Before: With the help of the miner elf Marvin can access shortcuts to earlier areas. All of which form a perfect line for his toboggan to sail through.
- First Person Snapshooter: A variation. Marvin can make sketches of any animals he comes across with eleven to track down.
- Free-Range Children: Marvin can go spelunking and climb over a broken railway bridge on his own as long as he's back before sunset.
- Gotta Catch Them All: The collectible snowflakes actually serve an important purpose, powering up his double jump to the levels of flight.
- Jump Physics: Marvin starts off jumping his own height but with the power granted by the elves he can soar int the clouds with his double jump.
- Mix-and-Match Critter: The Mitten Thief is a fluffy creature about the size of a Fox with reindeer antlers.
- Monster Is a Mommy: Turns out the Mitten Thief was stealing mittens so it's babies could sleep in them and stay warm. Marvin returns the two mittens he retrieves upon finding this.
- The Voice: Marvin's Mom calls him home at the end of each day and hums him a lullaby but doesn't appear outside of her shadow in the doorway.