I suspect that writer's block afflicts mainly people who have some stable and ample source of income outside of writing. So far it hasn't been a problem.
Mysteries I read for fun, so I will probably never write one, for fear of spoiling the fun.
Actually ideas are everywhere. It's the paperwork, that is, sitting down and thinking them into a coherent story, trying to find just the right words, that can and usually does get to be labor.
I had immediate success in the sense that I sold something right off the bat. I thought it was going to be a piece of cake and it really wasn't. I have drawers full of - or I did have - drawers full of rejection slips.
I don't know why a computer game can't be an art form just as a puppet show or an opera is. I'm still interested in computer games as something I would like to work on someday.