My approach to what I do in my job — and it might even be the approach to my life — is that everything I do is the most important thing I do. Whether it’s a play or the next film. It is the most important thing. I know it’s not going to be the most important thing, and it might not be close to being the best, but I have to make it the most important thing. That means I will be ambitious with my job and not with my career. That’s a very big difference, because if I’m ambitious with my career, everything I do now is just stepping-stones leading to something — a goal I might never reach, and so everything will be disappointing. But if I make everything important, then eventually it will become a career. Big or small, we don’t know. But at least everything was important.
A theory of change is the opposite of a theory of action — it works backwards from the goal, in concrete steps, to figure out what you can do to achieve it. To develop a theory of change, you need to start at the end and repeatedly ask yourself, “Concretely, how does one achieve that?”
How do you make a game that’s fun? ...You have to focus on gameplay. In order for the final product to be fun and exciting, the core game play needs to be fun and exciting. The creator of Mario calls this 手応え (tegotae), which is often translated as “game feel”. To find this game feel, you need to build small prototypes around a single idea, play test them, and then follow the fun. Nintendo does this, indie game devs do this; this is the not-so-secret of the gaming industry.