Audio

        For audio, we can use various sounds to increase suspense. We could use a heartbeat slowly getting louder and louder. We could use a clock that ticks faster and faster. We could have sound, then suddenly have it stop before the attacks begin. We could also have loud audio have it stop for something like 5-10 seconds, then continuing it at the same volume.

        We could have audio of the characters interacting with the environment. Like the sound of someone running then tripping while trying to get as fast as possible. Any audio cues that would increase the suspense. A key thing would be to review the audio various time and get the audio length to the best it could be, not too short while not lasting longer than it should.