Reference article
Arcade
The postgame collection of high-score training games and Domo Kun Shootout.
Unlock
Win the 
Champion Race to access the arcade from the 
Throne Room.
Activities
Replay running, swimming, climbing and flying activities for high scores, or enter 
Domo Kun Shootout. These are postgame score challenges.
Duck selection
Retro Pack’s arcade offers the four specialised duck types. Whether completing all four paths unlocks a Supreme Duck arcade choice in original Flash is unknown.