Earlier quoted context omitted.
Controls work normally for me on a desktop
The first part of OP's page indicates > Simplified flight physics: The flight simulator is designed for casual exploration rather than high-fidelity aerodynamic training. Google made flying possible with 6 controls only, and it's a feature! It works normally, but they indeed have no busines helping you prepare for ATP license exam with beautiful maps in the browser It'a an arcade game and it's fun
Indeed nobody should have an assumption this would prepare you for an ATP, that alone should be disqualifying.
The post i replied to was talking about the controls being wrong, which I guess might be a bug. For what it is the controls are correct tho