Ooh, yeah the colours were just randomly from memory (I think the blue is a bit too bright/saturated too)
i think it is interesting that the old editor can be identified like this too hehe:
(Not accurate, just from vague memory)
I used Paper by 53 (which lets you make, move around and duplicate the block shapes really easily )
As for how long it took me, probably not many minutes (I did it randomly during a class shhh... but we were talking about design-related things a bit before hehe)
And thanks for commenting, I had not thought about more detail actually While I was doing these, I was thinking that this might be a way of how they might design aspects of the app, i think it's interesting hearing about design.