Going along the surf will lead to 3 different places in the jail with a fourth "hidden" area being accessible through a code at the end.
The very end includes a small credits room with code that can lead to a secret room with an extra surprise. There are 2 other secrets hidden including another shameless-self promotion room (again) and a killer secret.
There is one music track that can be heard by all players and two other short sound clips are heard in a specific area. All rights go to the original creators of those sounds. If you need a version without the sounds, message me on steam and I'll stop being lazy and get that version for you. Other then that, hope you enjoy.