Overall I liked it. Some of the stories were more entertaining to me than others, but the stark contrast between them just made me want to keep reading to find out what the next story would be like.
Agreed about the ending, but when I found out there were more books in the series it made a bit more sense. I have the second one in my to-be-read pile.
Jumping Flash (ps1) was my first ever game. https://en.m.wikipedia.org/wiki/Jumping_Flash!
It was pretty hard as a 5 year old.