About Epoch Hopper

A kid on forearm crutches opens portals through 100 million years of evolving life, leaping one million years at a time.

On a computer: A/D move, Space hop, left click blue portal, right click orange portal
On a phone: Stick to move, jump button, tap a wall to place portals

John described this game in a sentence on OhMyGames and the AI built it. You can make your own the same way, free to start.