I loved this game and played it a great deal on my Spectrum and then, Amiga.
Wanting to visit the abstract world of The Sentinel I began to experiment. This demonstration shows my effort to date. There is no logic or gameplay. So you'll just have to IMAGINE you are absorbing trees, creating copies and avoiding the sentinels gaze. However, you can rotate your view with keys A (left) and D (right). I was curious to see how head input might potentially work with fix positional rotation. I found that anything but fast rotation speeds resulted in sim sickness on my part. Hence the fast rotaion speed, which has no bad side effects on me at all.
Fantastic effort, thanks so much for putting this together. The Sentinel was just one of those perfectly constructed games that can exist on any platform in any decade - certainly it has this in common with chess. It never relied on graphics or high-end hardware, but the idea of experiencing that sense of claustrophobia and being watched as well as the static perspective means this game will finally have found its home.
I imagine the transition from starting in a canyon to achieving the highest point in the land will look spectacular in a VR headset. Please count me in: