This is how I took screenshots for the app store
- Change screen resolution on my 15" MBP to the "larger text" option (so UI elements are as big as possible)
- Make code changes to make the screenshot consistent
- Change high score to 75,000
- Make "pause" button always says "pause" (so they can't tell I'm pausing when I take the screenshots)
- Go full screen in the app, take a screenshot of the screen (make sure top bar is not visible)
- Edit screenshots size in Preview to be 1440x900
- Don't forget to move the mouse when screen recording!