To educate....#31 has  4 major 'mistakes'...
1...lens flare....Photoshop should delete it from its inventory.
2...texture filter....its not canvas...it's a computer screen.
3...Oversize text...what, you don't know what OS you are using?
4...actual good design practice....never use quite so many different fonts in the one project.
Of course, remove all these errors and you'd have a blank screen......black is good....