This was a fun idea! I quite like TTRPG concepts that are specific and closed, rather than really open-ended. The overall plot, pacing and ending are already mapped out, so there's a lot of fun to be had with this game through the GM and player's descriptions and imaginations alone.
It feels like one risk playing this game would be that the player has quite a lot of power, in that they can make very drastic changes to the rooms! I feel like if I was playing this game I would be tempted to come up with really straightforward solutions to the traps (for example, getting rid of the water in the piranha room), which would make the game pretty short! It feels like some of the traps avoid this problem by being less easy to understand right away - I thought the dark room full of razor webs was a great idea, for example.
Overall I thought there were some good ideas in this, and with the right combination of player and GM this game could turn into a real battle of wits. Well done!