There's problems with this game.
Firstly, you complete the tutorial and it drops you into "the real world", where it looks like you can now do anything, but actually a bunch of things are still locked. Can't call additional functions from within the first function because something hasn't been unlocked yet.
I then tried running things using multiple function windows, and they would regularly run other function windows when I tried to run them, or stop when a take() function in another window would have been hit. Frustrating enough to make me give up with the game.