I've had ideas for characters
The Caveman: Runs slightly faster than the Runner but at the cost of maneuverability.
The Time Traveler: Can set points in time to travel back to if he falls off, but has a large cooldown.
The Zombie: Slow moving, high jumping undead freak.
The story is really interesting and I like the cutscenes! They're sort of like reading a comic book about space tunnel aliens. (P.S. This game is great for nausea)
1) There's air in the tunnels. 2) Who says aliens need air? 3) Animals have personalities, and this lizard just happens to be very calm.