Those are the icons for the eventitems that will be added on August 14th: woodworms, tailwind, magnetic nails (in that order). They were mentioned in the forums - they will help you with the minigames.
English:
Woodworms: Makes ramshackle targets even more susceptible - try it out!
Tailwind: For that extra boost in speed!
Magnetic nails: This times opposites repel - and how!
German:
Holzwürmer: Marode Ziele sind anfällig- probier es aus!
Rückenwind: Für das extra Quaentchen an Geschwindigkeit!
Magnetische Nägel: Gegensätze stoßen sich ab- extra stark!
Don't get too excited, they're just meant to help you with the minigames. Please also don't ask me for more info, I don't have any.