This movie is a prequel to the Tanoshii Muumin Ikka series, and is a good introduction for those who want to see more of Muumin. It doesn't matter if this movie is seen before or after the series, since it takes place before and, as I said, is a good introduction. Here we see how Moomin met Snufkin, Floren and Snork, his brother. They go on an adventure to find out about the comet that is going to fall on Moominvalley. Since I saw this movie before the series, I knew nothing about Moomin's world or the characters. Everyone is introduced in a natural way as theyare going to find out about the comet.
We know that Snufkin is a wanderer who doesn't care much for material possessions; Snif is greedy for wealth but never gets anything; My lives a lot with the Moomins and so on. Of course, this was introduced in the series, but this for me, who saw the movie before, was a good introduction.

I liked the characters in the movie, and did not intend to see the series. I ended up watching the series and liked the characters even more.

The technical part of the movie is ok. It is on the same level as the series, when it comes to animation. What stands out most in this movie in terms of visuals is the extremely well-detailed scenery.

The end of the movie is pretty cool, and it can make you want to see the series.
In general it is a nice movie. It is very simple and functional to get to know the characters. I recommend it.