I came up with this slowly

New Mario Kart Game Idea
The Newest Game Council is an easy to put together exercise chair with bike pedals a steering wheel with buttons and a speed meter. So now the acceleration of your kart depends on how fast you can pedal. The council was made by the government to encourage a healthier lifestyle.

Mushroom Cup:
-Luigi Figure 8: similar to the Luigi Circuit from GCN but to course completely crosses over halfway through. Has speed boosts on curves. Possible Chain Chomp.
-Peach Promenade: A course within Peach's castle, similar idea to Bowser Castle but much easier
-Koopa Troopa Beach: a remake of some sort
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Flower Cup:
-Baby Park: This time involving a carousel, swings and a Hop scotch like terrain
-Mario Training Course: Canada's Worse Driver much? Has many cones, pot holes, ink spills, pedestrian crossings and traffic lights that predict emerging taxis. Piranha Plants.
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Star Cup:
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-DK Tower: The DK cannon shoots you on top of an unfinished tower in the middle of the jungle where a robotic Donkey Kong tosses barrels down the stairways below.
Special Cup:
-Sherbet Land: Very slippery and complicated. Ice Bridge, cave with ice stalactites falling, snowmen, ice cold water and a corkscrew down the mountain, topped off with giant snow boulders.
-Wario Raceway: A mix of a stadium and the traffic courses. Find yourself in a stadium full of racing Shy Guys going in all directions. Shy Guys can collide and create firery crash sites.
-Bowser’s Castle: Got nothing planned yet
-Rainbow Road: Spinning rainbow platform. Most notable is a rainbow arc that can be topped onto with a mushroom then ridden with boosts, very risky though, similar to the bridge arcs of Mushroom Bridge.
Retro Levels
Shell Cup:
-Mario Circuit 2 (SNES)
- Riverside Park (GBA)
-Baby Park (GCN)
-Kalimari Desert (N64)
Leaf Cup:
- Royal Raceway (N64)
- Cocunut Mall (Wii)
-Shroom Ridge (DS)
-Bowser’s Castle 2 (SNES)
Banana Cup:
- Sherbet Land (GCN)
-Maple Treeway (Wii)
-Airship Fortress (DS)
-Mario Circuit (DS)
Lightning Cup:
- Yoshi Valley (N64)
- Lakeside Park (GBA)
-Ghost Valley 3 (SNES)
- Dino Dino Jungle (GCN)
Battle
-Royal Ballroom
-Double Deck
Comicon Exclusive: Giant Bathtub