It's tough for colorful and/or creative games when the vast majority of gamers are kids/young adults that only want to play stuff that makes them feel mature.
I think social media has a lot to do with it. The times of playing whatever you want in privacy is largely a thing of the past, and Facebook has made everybody feel like the world is watching them at all times. You could probably write a thesis on this theory, actually.
Currently playing:
Bloodbath Paddy Wagon Ultra 9







