if you are looking for a great custom map to play that wont take a short amount of time, i suggest InfinityProject's map! It took me 5 hours to beat it, and i was helped by the creator of the map! so it is definitely worth the time checking out! thanks to yall for checking this post out! oh and celeron, thank you for making minetest! without you, none of this would be possible!
heres the link to the map and forum:
http://minetest.net/forum/viewtopic.php?id=2021