The first two games with the Perplexity engine, Kidney Kwest and Baby on Board, were ... well, a bit different from this. Those were quiet domestic affairs. And while taking your medication for kidney disease is important, the stakes are raised in Headlights. Here, you're out in the wilderness and injured. What are you doing here? And why?
You may be able to guess, especially with the clues the game gives. The detective work is more about just looking around and finding items. The world's a bit surreal. For instance, there's dark liquid dripping from the ceiling of a cave, and when you taste it, it's awful. Guessing the liquid provides a clue. There are also minor puzzles where you need to find a way to make light or gain strength. It feels like standard cartoon or comic book logic, which again is an effective indication you aren't in the real world. But for the most part, you look around and find things based on the room's description, and the verbs you have to guess are very standard.
So it felt technically smooth, much smoother than the previous games. They certainly had their charm, but you had to wait a long time for the next move. You can probably guess what has happened to the mangled deer. Everything's pretty tidy. Though I'm still not convinced that, as-is, the Perplexity engine has any special advantages over a standard Inform parser. I like the drop-down box that appears to fill in a command, e.g at one point, you may try to PUSH BOULDER, which fails, and once you think you can, you can autofill after typing P. That's not related to syntax parsing, and I'm still not big on the debug messages that correct your grammar if you type "PUSH BOULDER" instead of PUSH THE BOULDER. But the tutorial was neat and helpful and the engine appeared faster than I remembered from Kidney Kwest.
The writer does have a good concept of design, but unfortunately the dream world introduces a lot of puzzling for puzzling's sake. If you know the conventions, there's not much to worry about, but the problem is, without much to worry about, the big reveal doesn't have a lot of oomph. It feels like implementing Perplexity for text adventures has overall been positive, and it resulted in a clean, sensible game, but I can't help the chat-style interface worked better in Thanatophobia, and the creativity of both authors (Jordan White and Eric Zinda) would be better served using something that's already there. So far I even think all three of the games would look great in Adventuron (sadly absent from this year's comp.) But it's obvious that progress is being made with Perplexity as a text adventure platform