Stickers are fantastic decorations that are guaranteed to improve all of your creations. One thing uncommon about them is that they're not affected by physics (gravity to be strict). They just... well... stick, wherever you place them.
New version introduces 5 stickers:
Just 5 for now to test the idea, but rest assured that I will be adding more. You can't change the colour of stickers. Instead you can change the size. I was amazed myself with the difference they make.