You might not have heard of Mind Game since it hasn't been released stateside (prospects of it ever being released over here don't look good at all, but there's a R4 release that's sub-only and the R2 has subtitles for the movie as well). Mind Game is a 2004 film directed by Masaaki Yuasa. I've heard a lot of comments praising this film, so my expectations were high.
Surprisingly enough, the story for Mind Game doesn't cover ground that hasn't been explored before. It's mostly about self-discovery, about making decisions in life and doing those things to the fullest. While these themes aren't anything new, the way they are presented in this film are what make them inspiring. The visuals in this movie are truly breathtaking. In a medium like anime where directors are more prone to emphasize the "tell" part of "show and tell", Mind Game falls on almost the complete opposite of that spectrum. With a near-perfect combination of animation, storyboarding and editing, it'll definitely be a hard ordeal for me to find anything that's on the same level of this movie when it comes to visual creativity. Though, I will say that due to how visually dense this movie is, it'll take me repeated viewings to completely appreciate it.
There's not much else for me to say unless I want to get into describing every amazing sequence in this movie, but to sum it all up, this is a movie that should be experienced by anybody who wants to watch something truly ambitious.