the movie was average i mean the plot is horrible but the art is amazing, the ending was so bad and with no meaning, i mean i a way that: 1 the ending didn't exactly had a end and 2 the time travel idea was bad interpreted and implemented i can't give more than a 4. i literally could have died without watching this movie, i really felt disappointed about this one.
if you are really into understanding the plot and find the meanings then this movie is not for you.
i read out that the author didn't even liked his anime adaptation from his own manga the way it end in a article he said that the plot was a bit longer and he wasn't satisfied with the plot.