Enter the four letters on the TV.
Gravity does the rest. Tap BOOST for a burst.
Holding ◀ or ▶ overrides the drag pad.
Your camera follows your marble. The strip under it shows the track walls closing in.
You own four marbles. Tap SWITCH MARBLE to take over another one — 10 s between switches, or instantly if the one you are on wipes out. You are scored on your best marble.