A fantastic movie ! I love how well structured it is despite being only 40 minutes long. Not only is the story really great, beginning with the apparition of a single Digimon and ending with a dramatic situation threatening the entire world, but the staging is also incredible.
All the movements in this movie feel incredibly lively, with great framerate modulation giving more impact and momentum to the scenes. I also love how the movie makes us take part in the universe : whether it's with the first-person perspective shots (especially that scene where Taichi was slowly reaching for the computer, with his heavy breath in the background, only to end up being "absorbed" by it off camera), characters looking at the camera breaking the 4th wall or even the recurring use of still camera long shots, the spectator is split between pure observation and active involvement, and feels compelled to empathize with the characters.
The art direction is also really interesting, alternating warm and cold colors in the Digital World to create contrast and further emphasize the surreality of the world. The fact that the linework of the characters was purposely heavily toned down was also really intriguing, and surprisingly gave even more impact as the characters were blending in their surroundings.
A great movie depicting the struggle of children fighting against an immaterial ennemy in a world where digital information is supreme but also source of alienation, manipulating society as if they were pawns and whose slightest flaw can plunge the earth in despair (I think one of the last scene where we see the people inclinating their heads following the movement of the defused bomb falling is proof of that, but I'm not really sure of it's meaning). But much more than a simple satire of society, it was ultimately a fantastic story showing the bonds between humans and Digimon !