You should design the two words "Quiz Turnier" with a symbol / icon next to it. There is no requirement what this symbol should be, please come up with something.
There also is no specification concerning colors since the website has not been designed yet. However the background color of the site will be white, so your logo should work on white.
The format should be wide-rectangular (something between 1:2 and 1:4 but no extreme vertical / horizontal format).
Its up to you, whether you want to capitalize the "Q" and the "T" of "Quiz Turnier" and if you want to write it in one word or in two. All these options would be correct in German:
The main attributes of the quiz community will be: Knowledge, brainpower and speed.
I am excited to see what you come up with.