[DEMO AGAIN?] SERVANTS STORY

[Anxt]

Adding puzzle elements and monsters make levels longer, but don't do it just for the sake of making the levels longer. Things have to have a good flow, or the player will get frustrated. For example, if the player hides in a closet for 5 minutes while a monster wanders outside, yeah, it makes the level longer, but the player isn't scared, nor is he/she having fun. Try to find a happy medium.

Edit: You can also make the rooms that the player wants to explore, occasionally scattering tinderboxes and oil so the player is rewarded for exploration, therefore encouraging it. This can also open doorways to adding scares.