[Time to completion: 5-10 minutes]
You have been driving on a nameless road, for more hours than you can remember, for more hours that you should be. It's time to take a break, so good thing there just happens to be a service station coming up. It's deserted. The bathrooms are all boarded up.
The setting and premise has rich pickings for a horror story: one might find anything in an unfamiliar, deserted town - monsters, abysses, pure evil... The wee hours of the morning and tired narrator mean disorientation even in the best of circumstances, mean isolation and loneliness.
This Twine contains an inventory and location-based system, using the PC's need to use the toilet as impetus for exploring the locations. The objects in the inventory make up parts of an implement. The choice format removes the need to fiddle with verbs like one might in a parser IF (e.g. USE X ON Y), but, at the same time, wrenches control of the environment from the reader. This adds to the somnambulant atmosphere, like a malignant muscle memory: your limbs following the orders of something other than your conscious mind.
The cadence of the writing is staccato; terse - in moderate amounts, it underlines the starkness and desolation of the setting.
The LEDs flash pink and green. The buzzing gets louder. The buzzing gets louder. The crying stops.
There is sometimes too much of it, presented in uninterrupted chunks. Pacing is not always the strongest point.
This game strikes some of the same notes as Kinsale Horror: in both, the PCis a traveller stranded in a strange town which just becomes stranger and stranger. This game has much more ambiguous ending - benign, almost, as if you were recounting this as an anecdote in a social gathering - while Kinsale Horror carries through with the threats the setting makes.
As has been mentioned, this game has many parallels with a typical creepypasta - an almost real-world setting, amnesia, mutable settings - though I THINK I'LL STOP OFF ON THE WAY does make use of its format, by giving and removing player agency to drive in the creepiness.