Really enjoyed the drawn tutorial. The jumps feel a little off,  got caught on the edge of the floating platforms multiple times and needed to just fall off into the abyss. But the doors and hazards are cool, good bit of push your luck with the door picks. Nice work.

Me, casually walking through a door:

Magic lasers from the sky: "Not today."

Finished on my first try! I liked the idea of the doors having different effects, and the hints at the beginning were funny since they contrasted the dark atmosphere. I'm sure that was just a time thing but still haha. At first, I thought the choices felt pretty unimportant, but as I approached the end I had less and less health to spare which got tense. Love that feeling! For some feedback this is what I made note of as I played:

• The doors came in only a few colors despite there being more effects than that, so some were pigeon-holed into being for the same door, making it a bit confusing at a glance. Like the black door being a free pass or coin flip. If possible, making each door use a different texture based on their effect would let you recognize patterns as a player more. If you wanted to be mean you could introduce a fake door that could copy the other ones or something too lol
• The delay before boulders fall was just a little too long in my opinion. It would also be fun if they took out the orbs or something but that's just an idea. This one is pretty specific.
• Naming consistency. You refer to the player's HP as "Health" and "Blood". I think you should pick one and stick to it. The flavor text parts don't matter for that (ex: "Sacrifice blood to ease the future"). Just the text referring to gameplay (ex: "Gain 3 Health").

Anyway, I thought the game was a good length. I could really see it being expanded upon with special doors that lead down alternate paths, or just an extra effect on doors to make choices harder, like changing the type of obstacles/room coming up. A whole 3D game in that time frame is impressive. Congrats!