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

RANKED RUN One per day. Crashes are fine; ending early is not. PRACTICE Unlimited. Nothing recorded but your best. ← Back
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

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Tandemonium

Party Physics Game on a Tandem Bicycle

RIDE TOGETHER SOLO RIDE Don’t see your controller? Pair it 📱 Phone as controller

Where are you two?

PLAN THE RIDE
← Back
← Back

Choose your seat:

START A RIDE
Captain · Front seat
JOIN A RIDE
Stoker · Back seat
← Back

Local versus

VS

on a controller to join · switch team · leave your seat

Don’t see your controller? Pair it CHOOSE LEVEL ← Back

Your room code:

----

Long-press URL or QR code to copy link

CHOOSE LEVEL

Online multiplayer

Your partner enters this code, or scans the QR code, on their own device.

Local multiplayer

Two controllers on this screen, one bike.

CHOOSE LEVEL
← Back

Enter room code:

TNDM -

Join a ride

Enter the code on the captain’s screen.

JOIN
← Back
Keyboard only!
Motion Steering
Stable Responsive

Users First (Games) v.697500b | 10-25-2026 15:53

Tandemonium Actions Help Leaderboard Profile Controls Music Settings
Steering feel StableResponsiveRecalibrate
DONE

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
Let's RIDE!

PLAY AGAIN END RIDE TOGETHER
🎮

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
Show Solo
Solo rides show one goose (the captain) — applies immediately
Goose Outfits
Which pair of geese rides the tandem — applies immediately
Goose Colours
Colour changes for the chosen pair (saved per pair) — applies immediately
FPS Display
Frame-rate readout, all modes — applies immediately
Crash Physics
Tumbling crashes, knocked pylons, goose strikes — next ride
Display Testing — overrides
Overrides on top of Graphics Quality, for testing a TV or slow screen. The page reloads to apply.
Render lines
Edge smoothing
Perf readout