Treadmillasaurus Rex is…well…I’ll just take the description from Reddit:
You are a T-Rex running on a treadmill avoiding lasers and saw blades during which the Wheel of Awesome relentlessly spins and doles delights such as +1 Confetti or dishes determents such as +1 Obstacle. There’s also unlockable top hats.
That pretty much sums it up right there.