Dozey

Personally I greatly enjoyed the game. It has puzzles that will provide a reasonable enough challenge for anyone remotely familiar with code vulnerability exploitation or who is reasonably competent at coding. It's excellent at teaching the things required in it's own unique way. Learning these skills could be very difficult for someone who either has trouble thinking in a critical way about circumventing the rules or for people who have no experience with computer languages. Basically if the knowledge gap, either the one in act 4 or the one in act 5 are not too severe it will likely be one of the more fun games you've played. If it's too severe it will be a nightmare and more like homework or copying other's solutions to the problems.