To win Schummel Hummel, you must get rid of your cards before the other players, and unlike in most games, you can cheat to dump cards from your hand. Throw them over your shoulder, hide them up your shirt! However, one of the players represents the watchman, and if they catch you cheating, then you have to both keep your original card and take one of the watchman's, while also taking on the role of the watchman.
Aside from the cheating, you must play cards onto the middle pile that already match the top card there, possibly using the special powers of the various insect cards as well. You can also try to steal a grasshopper card sitting between you and your neighbors. If you can snatch it without them noticing, you force them to draw two more cards from the deck.