The first Creator's Contest is over. Some of the winners:
A solar powered accordian
"Tea Time", a tea shop management game similar to Overcooked:
"Don't Break the Line", a coin-operated mini arcade with a 70s-esque game that dispensates candy to the winner:
More: http://www.siliconera.com/2018/07/12/first-nintendo-labo-creators-contest-winners-revealed/
Also, while not an official winner, these guys used Labo to make a working laser tag kit, complete with sound effects and health bars for each player: