ugh the game, unlocking all the levels. How do you unlock the levels? By opening every egg on every level. There are all kinds of gifts hidden inside the eggs: princesses, gems, animals, cakes, etc. Try to collect all the gifts by opening all the eggs on all the levels.
The only problem with Surprise Eggs Princess Star, aside from not being able to taste the delicious chocolate or play with the toys you get from the eggs, is that there are a lot of ads. But if that doesn't bother you, get ready to start having fun opening all of those surprise eggs.