All you need to do is click each letter ONCE, if you don't some of them will GLITCH, so please don't complain in the comments.
This is in the honor of my birthday, and I had no clue I was going to make this, and then I wanted to go on Scratch, so yeah. (p.s., some of them take a while to actually finish, so it's perfectly fine to press different letters at the same time).