Good movie, honestly liked it better than Sponge Out of Water, and to be honest, I'm willing to accept this movie as an alternate timeline compared to the one of the main series.
...and as expected, the animation is superb and very close to Season 1's animation which is a huge highlight of this movie, and I very much prefer it compared to the CG animation of Sponge Out of Water which is a lot more stiff in comparison. The jokes are pretty funny too, I laughed at a lot of them.
Overall it's a very cute and fun movie for fans of the show. Mainly for the newer crowd but those who appreciated the older seasons a lot more than the new episodes can appreciate this too. First one remains undefeated however, 4/5.