I am trying to place the "gas" and "break" sprite on the left and right on window.
In addition to being on a HUD layer with 0,0 parallax, you might want to give those Sprites the Anchor behaviour, so that they will maintain their position relative to the edge of the screen on different resolutions.
I can't find the Is on mobile expression , i am using construct r233
When adding the condition, double-click on System, scroll down to Special Conditions and you should find Is on mobile device there