That first puzzle is meant to show you how to use directional commands, the actual thing that it does at the end is printing 0 (with ' . ').
There are 3 other puzzles, but for those you have to put together a full funge since I forgot to unbork the free one. You can pick and place components that have the "Select" prompt by right clicking on them and then left clicking on a board (the big quads with nothing on them, the components one the first puzzle are unmovable tho). "Select" on sockets connects them instead. Behind the first puzzles there are some buttons that you can press to bring up better explanations.
Good luck.