An unexpected plot twist that changes the character of the entire series, both the previous and the remaining parts. A complete turnover from the relatively simple escape-the-place logic of the previous 3 full games, which makes it quite more intriguing. The compination of item-founding logic and puzzle solving keeps the viewer's interest high throughout the length of this submission. JonBro is both a brilliant programmer and an excellent game designer and in Riddle School 5 [which, from my point of view, should be the first episode of the following attached series due to the different story and world in comparison to the first 4 episodes], he demonstrates his abilities in the best potential way.
My rating is 10 out of 10, one of my long-time favourite games with remarkable plotting and awesome gameplay, which I still play from time to time to occupy myself.
[Note: He made me curious with Riddle Attorney and Riddle School 3+1 in the extras. Obviously we can only guess how would they be in case their production proceeded.]