Everything Will Be Okay - First part of a 3 part movie. You should definitely watch all three parts "I'm So Proud of You" and "What a beautiful day". It's really sad.
World of Tomorrow - Probably his best work and definitely deserves an Oscar for short movie. This is a 100% must watch if you're a fan of movies. It'll be impactful in the future. It's a short story consisting of a mixture of sadness, humor and innocence.