This is a fun adventure with great fundamentals: strong hooks, varied and interesting enemies, puzzles, multiple entrances, jacquaysing, and a ticking clock. I like the twist too; awakening the mech by violently saving the kid is a great climax, and the option of seeing the villain get his comeuppance from the mech is a solid alternate.
In terms of feedback, I did struggle a bit with the map. I didn't really understand how it extruded from the cliff wall, and I found the Roman numerals a little difficult to scan at a glance. They definitely give some great vibes, but (for me anyways) it felt hard to parse. In Temple Exterior, there's a reference to IV. Atrium rather than V. Atrium, and in III. Hallway and VII. Control Room there are cases of VII. Ritual Chamber that should be VIII. Ritual Chamber. I'm also not sure I understood the placement of C, but that's probably a me thing.
Congratulations on creating two pamphlets for the jam, that's awesome. This is a great entry, and I can tell lots of people will enjoy running it.