well, if you have those serial functions that are executed one after another, you could output break info.
mmm... not as output value but error maybe...

code:
$functions="function1","function2","function3,GameIsOver()"
for $c=0 to ubound($functions)
  $=execute($functions[$c])
  $error=@error
  if $error=22 ;newgame
    $c=-1
  endif
  if $error=33 ;gameover
    $c=ubound($functions)
next
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