"You do not play."
Translation:Jullie spelen niet.
Subject and conjugated verb are always together in first and second positions respectively. The rest of the sentence comes at last.
'Geen' is used as a negation in sentences where without the negation 'een' would be used, so basically with nouns. 'Niet' goes with verbs. Note that it's 'jij speelt' and 'jullie spelen'.