game design on 2D platformers

Game design
2D platforming

Mario
http://blog.relationshipsurgery.com/wp-content/uploads/2014/08/mario_1.jpg
super smash bros brawl (story version)
https://i.ytimg.com/vi/qaNicux3DRs/maxresdefault.jpg
Castlevania symphony of the night
https://r.mprd.se/fup/up/163439-Castlevania_-_Symphony_of_the_Night_(USA)-1474102713.jpg
ghost n goblins
http://cdn.themis-media.com/media/global/images/library/deriv/913/913313.png
Metroid
https://upload.wikimedia.org/wikipedia/en/0/07/NES_Metroid.png