I just finished watching this movie and it is probably my favourite documentary I've ever seen. The arc that Phil Fish, in particular, takes is dramatic in the perfect way, with him experiencing anger, optimism, anxiety, and everything in between. The film gets you deep into the mind of each of its players and shows you the immense effort that goes into making a, from the outside, simple game.
Indie Game: The Movie is everything that I could've wanted it to be. It shows such a deep respect to the process of video game development and all the people that go through it. Seriously, go see it now.