Tap on the bottom left corner of the TV set, right on the item that looks like a small keyboard. Tap on the rightmost button on the third row. (Secret hat on the TV.)
Press down on the troll’s nose.
Tap on the left watering can twice, then tap on the right watering can once.
Tap thrice on the right branch of the tree.
Tap on the slot machine’s manual button, then move the three columns so that you get three troll faces.
Tap on the numbers 8 7 6 5 5 in order to call the troll. Tap on the phone button. (Secret hat beside the Troll paper)
Select the horn, eyes, teeth, hands, and the top left cloud to spot the five differences.