"Terminal Interface" is immersive in the sense that you're communicating directly to a character and directing his movements. Or, more precisely, you're directing the mechanical unit he's in while he provides visual feedback. The story opens with the mechanical unit's manual to give you an overview of how it works, and from there it's you and your faithful underling in the driver's seat.
I don't think it's possible to properly discuss this little story without some major spoilers, so SPOILERS AHEAD.
The big twist is the unreliability of Lemmy, the character on whom we're depending for visual input. There are a couple of indications along the way, so this isn't a case of playing from hindsight. Once we've twigged to his duplicity (hopefully before we've done something we'll regret) it's a matter of outsmarting him before he gets wise and jumps ship.
The story works pretty well, but for a couple of mechanical issues. Firstly, it appears that the save, restart, and undo functions have been disabled, which means having to replay the whole thing from scratch if you want to try anything new. Secondly, the game seems to lack a proper end state: whether you manage to pull a final one over on Lemmy or whether he gets the better of you, you're still left idling in the game world with nothing left to do but quit. This may be realistic, to some degree, but I found it rather unsatisfying.
Eggs over easy with rashers of heavily salted bacon: salty, and you want to be careful not to break your yolks. You'll have to manage your thirst elsewhere, though, because there's nothing to drink.