Needless to say, I failed epically
Remember Construct is in Beta. It may be difficult to tell if you're just starting out, but Construct could be failing epically, not you
[quote:32fo0oo1]First problem: detecting that the mouse button has just moved down.
'On click' fires when the mouse button goes down, 'Mouse button is down' is true for the duration of the button being held down, and 'On mouse button released' fires when it is ... released. Yeah.
[quote:32fo0oo1]I couldn't work out whether expression names are case sensitive -- is there a difference between "MouseX" (from MouseKeyboard) and "mousex" (from System)
There is no difference. Construct is not case-sensitive.