For those who would complain about the non-existent nature of this game as a flash game now: Moving from making free games to paid content is a natural step for many game developers, especially when you have a game as intricate and detailed as Mu Complex. You cannot complain about games going paid. It was provided free for a time, the dev feels they deserve money for the work they've done. And they're right to feel that way. Stop complaining. If you like the game, support the developer, purchase it. It's incredibly fun to begin with.
I think most people are complaining simply because they don't have a job so they can't buy a ten dollar game on steam.
funny. I was thinking Echochrome by the description. But I can't play it. This is the only unity web game that still asks me to install UnityWeb, even though I already installed it and it is up to date.