Pick one and it starts. These are the game's own packs, in its order.
Choose one and press the key you want; Backspace takes it away and Esc leaves it as it was. The arrow keys always ride too.
Keys on the page to ride with, for a phone or a tablet with no keyboard.
↑ ↓ choose · ← → change · Enter select · Esc back
Progress, settings and level packs are kept in this browser.
Drop a .prc on the screen to install it.