I played all the way through this (I got all but one dino apparently.) Fantastic. As someone who still loves the original SNES game, this is great. A few cool notes about this.
1) even though you can see clearly, have a good frame rate, and can strafe, it is still spooky because you have limited ammo and the dinos can see you around corners before you can see them.
2) the fact you can carry multiple ammo types, actually makes the original's hint of "different ammo works best for different dinos" actually a real gameplay mechanic; in the original, you just get rockets (and max them out since you can just leave an interior and they respawn, allowing for easy farming.) but here the ammo is actually limited, and it's actually a bit of a puzzle to figure out what dinos work best with which ammo. I barely scraped by even after figuring out shotgun works best on dilos, and rockets on raptors (I think.)
3) the fact you cannot save creates a classic old-school challenge and makes the game scarier. if this had been on NES like this, I'd likely still consider it as spooky as Friday the 13th or Maniac Mansion, both of which were similarly unforgiving in a good way.
If this were ever expanded to add the other interiors, with interlocking accessibility (keycards, computer hints like "Power Controls Can Be Accessed in Nublar Utility Shed", etc.), I'd play through the whole game. Even if you just made a menu list at a front door to click which building to go to, with no overworld, it'd still be fantastic. This experience has made it pretty clear the heart of the SNES JP game was the interconnected 1st person interiors, and while the exteriors were fun, if I had to choose between a game with just interior or just exterior, the interiors win easily.
This is like a good resident evil game. all the principles are there and apparently always were, which this version has revealed in full light.
As far as tweaks, this is almost perfect. I'd add one of those "directional damage" indicators, since sometimes I could not tell if I was being attacked by a raptor in front of me or a second one behind me since the lack of 3D makes it hard to tell when the raptor is "touching" the hero. I wish I could toggle a goggles vignette for a narrower view, as well as toggling a "flashlight" mode where the game is in darkness until i turn on the power or something, for extra spookiness. I almost wish this were like Daggerfall Unity, ie moddable, as I'd happily make and add in 3d models of the wall tiles, dinos, props, etc. in a weekend if that were possible since I've gotten fast at modeling basic low poly stuff in Blender anyway. May not be possible if this really is like a Mode7 or pseudo 3d experience, but if it is and you want to add a "3d models option" now, years after its release, hit me up on twitter.
As it stands, this is fantastic and actually quite a good small game that really captures the feeling of the original and is actually better from a mechanical standpoint considering the ammo strategizing I mentioned early. it's like a survival horror experience.
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ADDED AFTER A SECOND PLAYTHROUGH (got all dinos this time):
the game was much easier once I realized I had been wasting ammo. unlike in the original game, rockets and shells don't stack beyond 8. and each refill gives you 8. so I was over here getting a rocket pickup when I had 6 rockets, thereby wasting 6 of them. wait till you are low or run out before picking up more, to get more ammo. an optional mode to have them stack up to... what.. 32? like the original game, would be cool. or an option to have the pickup show on the floor how many remain in that stack on the ground. same for health kits.
I'd make the door windows tranparent and like broken glass. then it would explain how enemies can see and projectile attack you through those windows, and you'd be able to see a bit so it would feel more fair. but a mode to have them classic like they currently are, would retain challenge and should be included as well.