0 km/h
▲0%
0 m
🪿 0
C
S
🚲
CHECK POINT
🐌
TOO SLOW!
Pedal: alternate ← and →
Steer: A / D
🎁 Grab presents for a speed BOOST
Pull back · aim · let go
ROAD AHEAD — CALL IT
RANKED RUN

Today’s Road

BOOST!
CRANK FIGHT!Same foot, same moment — alternate!
Match your partner’s beat with the opposite foot
▲
▼
Left Pedal
Right Pedal
▲
Left Pedal
Right Pedal
▼
▲
Left Pedal
Right Pedal
▼

Tap to Start

This browser can’t run Tandemonium

Try Chrome, Edge or Safari 16.4+, or update your phone’s software. On a desktop browser it should just work.


  










  

    
  

  Tandemonium
  
Party Physics Game on a Tandem Bicycle

  

  

    

    

      
      

        
        
        
        

          

            
            

            

            
            
          

          
        

      


      
      


        
        

          

            
            
            
            
            
          

        


        
        

        
        

        
        

        
        

        
        

        
        

        
        


      


      
      

        

          
          
          
        

        

          

            
            

              
Keyboard only!

            

          

          

            
            

              
Motion Steering

              

                Stable
                
                Responsive
              

              
              
            

          

          

            
            

              
              
              
              
            

          

        

      

    

    
    
    
    
    
    
    
    
Users First (Games)   v.e0e96ae | 10-05-2026 12:20  

  

  Tandemonium Actions
  
  









  

    
    
Tandemonium

    
A party-physics game on a tandem bicycle. Ride solo or with a partner — pedal, steer, and navigate to your destination before time runs out!


    

      
Toggles

      

        
        Leaderboard — View top scores for the current level
      

      

        
        Profile — Sign in with Google to save scores
      

      

        ALL
        All — Enable or disable all permissions at once
      

      

        
        Video — Share your camera for the ride
      

      

        
        Audio — Share your microphone for voice chat
      

      

        
        Joystick — Steer with gamepad left stick (appears when controller connected)
      

      

        
        Controller Gyro — Lean controller to steer. Press L3 to recalibrate
      

      

        
        Phone Motion — Tilt your phone to steer. Tap screen to recalibrate
      

      

        
        Music — Toggle background music on/off
      

      

        ?
        Help — This help screen
      

    


    

      
Learn to Ride

      
Practice pedaling and steering with any input. The tutorial adapts to your active controller:

      

        ⌨️
        Keyboard — Steer with A/D. Pedal with Left/Right arrows
      

      

        🕹️
        Joystick — Steer with left stick. Pedal with L1/R1 or L2/R2. Both together to brake
      

      

        🎮
        Controller Gyro — Lean to steer. Pedal with L1/R1 or L2/R2. Both together to brake. L3 to recalibrate
      

      

        📱
        Phone Motion — Tilt to steer. Tap the left and right pedals to ride. Both together to brake. Tap center to recalibrate
      

    


    

      
Attributions

      

        "Tandem bicycle"
        by Sameer.Rayeen — licensed under
        CC BY 4.0.
      

      

        "Krampus Workshop" by Kevin MacLeod
        (incompetech.com)
        — licensed under
        CC BY 4.0.
      

      

        Goose calls (goose-honk.mp3) by
        freesound_community
        via Pixabay
        — Pixabay Content License (attribution not required; credited with thanks).
      

      

        Thanks to The Central Ohio GameDev Group
        — for inspiration, friendship, and fun.
      

      

        Immersive audio design based on the taxonomy in
        “A Taxonomy for Immersive Audio Techniques in Video Game Sound Design”
        by Alex Sallade
        (sallade.5@osu.edu,
        Ph.D. dissertation, The Ohio State University, 2024).
      

    


    

      
Achievements

      
    
        
  • 👟First 500m — Ride 500 meters
    • 
        
  • 🏅1K Club — Ride 1,000 meters
    • 
        
  • 🏆5K Champion — Ride 5,000 meters
    • 
        
  • ⚡Speed Demon — Hit 50 km/h
    • 
        
  • 🤝Perfect Sync — 10 seconds of coordinated pedaling
    • 
        
  • 🌟Collector — Grab 10 collectibles in a run
    • 
        
  • 👑Hoarder — Grab every collectible in a level
    • 
        
  • 🏠Home Sweet Home — Finish Grandma's House
    • 
        
  • 🚲Grandma's Classic — Finish Grandma's on the default bike
    • 
        
  • 🍊Marmalade Delivery — Finish Grandma's on the orange bike
    • 
        
  • 🫐Berry Special Visit — Finish Grandma's on the magenta bike
    • 
        
  • 🍒Cherry on Top — Finish Grandma's on the red bike
    • 
        
  • 🌊Ocean to Grandma's — Finish Grandma's on the blue bike
    • 
        
  • 🌿Jungle Express — Finish Grandma's on the green bike
    • 
        
  • 🍌Banana Delivery — Finish Grandma's on the yellow bike
    • 
        
  • 💮Flawless — Finish Grandma's House with no crashes or restarts
    • 
        
  • 🤜Team Player — Stay safe 80% of a multiplayer ride
    • 
      

    

  








  
  

    
    
    
  







  

  

    

    

  







  
    
    
    
    
  




  
🎁

  
COLLECT




✅


← Stay on the road! →



  
Oops! Try again

  





  
You're ready to ride!

  

  

    
Steering Feel

    

      Stable
      
      Responsive
    

  

  
  
  
  









  

    
    
YOU MADE IT!

  

  

    

    

    
    
  

  
  
  

    
    
    
    
    
    
    
    
    
    
  





























🎮





  

    
Options

    
Graphics Quality

    

      
      
      
    

    
Some changes take effect on next restart

    
DualSense Input Source

    

      
      
      
    

    
Applied on next launch

    
Gyro Steering

    

      
      
    

    
Controller gyro only — applies immediately

    
Show Riders

    

      
      
    

    
Canadian-goose riders + front camera — applies immediately

    
FPS Display

    

      
      
    

    
Frame-rate readout, all modes — applies immediately

    
    
    
    
    
Crash Physics

    

      
      
    

    
Tumbling crashes, knocked pylons, goose strikes — next ride