Yeah self-publishing is very very very very very very very very... broken(can you imagine the YouTube title like I made 1 billion dollars in a year in tech Giants lol)
After 1c (speed of light) stage 3 would be fun an idea is that you have to go to a different universe where the speed of light is different (sorta like prestige)
Rookie numbers I get it in 3 days after I release my first game after about a month I've not got a billion but I would probably get it after ~5-10 years (but IRL my perfectionist self gets the best of me and I reset to get better market share)
About that last part actually it could become more saturated which is a debuff because well that's realistic. if you make one in a small genre it won't do very well unless you're an established game publisher in that case it's popularity will explode so that creating different games is rewarded.
We need a lore like are all these game companies in the same universe just like a little bit extra nothing like making it all story focused just to make everything make sense (also why isn't there multiplayer actually I get it's a web game but still how has nobody suggested that yet)