find the Easter egg or thing and click on it. there are 3 stuff to find in each level except the hard bonus round if it's to hard then you can skip it, 1 for skipping level 1 2 for skipping level 2 and 3 for skipping level 3 and e for skipping the bonus round
don't cheat, :) but if it's too hard you can skip it click here for part 2 https://scratch.mit.edu/projects/795276938/