First Clear Rewards
Missions and Clear Conditions
Mission: Capture enemy Command Post
S Rank Clear Condition: Not possible
The below video guide will both help you clear the stage.
Keybindings on emulator makes this pretty easy (on mobile you have multiple fingers), and the moment Architect's smoke cloud comes into view you can literally just copy what she does for the rest of the race.
Architect go up? Go up.
Architect go down? Go down.
Architect bounce? Bounce.