These are a couple of outdated stuff and the errors that I found while trying to do the Flixel Tutorial and that I (and future programmers) would appreciate if they get fixed with the proper code, so I can complete the tutorial properly:
"flixel.ui.FlxButton has no field screenCenter"
velocity.rotate(FlxPoint.weak(0, 0), mA);
"flixel.ui.FlxPoint has no field rotate"