Story
As already mentioned, it seemed forced to me. They tried it to appear tragic and all but the way they executed it I just didn't care at all.
The story doesn't flow well and looks crammed together.
Art
Trying to be artistic with glittery still images and animations and all kinds of unnecessary different "camera" perspectives. It annoyed me and didn't make the movie better. In fact it made it worse for me.
Sound
Fine, I guess. I liked the dango song in the series much better and the one in this movie rather annoyed me.
Okazaki had a different voice than in the series, which I didn't really like. But he also behaved somewhat differently, so it wasn't too tragic.
Character
Some of the characters are really annoying, like Sunohara & Nagisa's father. Also they're very unrealistic and not funny. Fujibayashi Ryou is missing and Kyou & Tomoyo are best friends in this movie. I didn't particularly miss Ryou, but the relationship between the two mentioned is weird, likely because it seems very superficial and one can't see how they might've become friends. So it looks forced, just like other relationships, too, for example between Okazaki & Nagisa.
Also the characters behave differently than in the series, have different characters and act overall more unrealistic.
Enjoyment
The movie felt rather ridiculous and forced to me, so I didn't enjoy watching it.
I kept watching because another review said the ending would be more realistic than in the series (which I didn't see that way).
Overall
Overall I find it to be a rather bad and annoying movie : /
