Possible Clues:

• 'Now the competition is serious!'
• 'Let's do this thing!'
• ''I accept the challenge!''
• 'Let's play!'
• 'OK, now I'm ready to play!'
• "OK, now I'm ready to play!"
• 'Now we've got a competition!'
• 'I'm ready to compete!'
• "Challenge accepted!"
• 'All right, let's play!'