Use logic to guess the secret four-colour code in ten guesses or fewer.

• Tap a colour from the palette, then tap a slot to place it. Colours can repeat.
• Fill all four slots and press Submit to check your guess.
• A green peg means a colour is in the right place. A yellow peg means a colour is in the code but in a different slot. The pegs are not in slot order.
• Use the feedback to narrow down the code, guess by guess.
• Crack the code before your ten guesses run out. A new code arrives every day.