Yeah sadly I did not have enough time to properly create a tutorial to explain everything,
Also there is no health bar, if your trapped by the swarm your screen will start to turn dark if you don't escape them in time your screen will turn completely dark resulting you losing and starting a new run.
Also to survive you have the stopwatch that can rewind time, when you press Q the stopwatch timer starts and when the timer is up you rewind in time to the point when you originally pressed the button, additionally you can press the Q button again before the timer is up to rewind without needing to wait for the full countdown.