Can you guess the platformer videogame from the song?

How good is your knowledge of platformer soundtracks? Can you guess all 21 games from their songs? Featuring a mix of new and old, well-known and more obscure games.
Let us know how you did in the comments!
This video was made by wonderfully talented ‪@darthaeris32‬ . She did a wonderful job compiling all the song and making the video interesting.