falling through labels should send you to the next one

[oatmealine]

it's common practice in eg. batch scripts to have something along the lines of

run command
[label]
run command

and jump to label if the first command should be skipped, but continue running the second command afterwards. currently in scrunkly, falling out at any label, regardless of position in the script, will end the script - this is unideal for situations like:

if tutorial_explained goto explained
say "here's how you do it!"
-- ...
goto explained
[explained]
say "see you later!"

having another goto at the end is a little unnecessary imo; and there's no real harm in instead forcing the less common usecase to use something like this:

goto exit
-- ...

[exit]
-- end of script