Splendid!
You can see the time and effort put into this movie. The dialogue is very rich, I almost cried when they popped the balloon, you can feel how much emotion and depth was packed in the balloon. The plot twist was outstanding, you can see the character development in SpongeBob, it was very exciting to see SpongeBob expressing his true feelings, his true love towards Patrick, in a way that feels very real and human.
The kissing in the end was the cherry on top, it felt very real, I got really emotional in that part because of how real it felt.
This is a solid 10/10.