I liked the final message ;) And I laughed several times with the text messages, specially with the fake palms of the top level xD
If I may, I would suggest you to a couple of easy upgrades. One, to include some music to get you more __inside the pyramid__. Another one, maybe double the size of the pyramid, so the character fits better in it. Or going for a first person camera maybe, so you don't get to see behind the walls. And finally, I would make the move depend only on WASD, and the rotation of the camera on the mouse---like in a standard FPS.
In any case, there is a lot of work in all the 3d modelling, and you achieved to deliver a complete game with two levels, so congrats on that :)
PD: Thanks for the Linux upload, it is not very common! Also, since your are using Godot, I would recommend you to upload to itch.io an html5 export. It is as easy as exporting the project with the html5 template with "index.html" as the name, zipping the 5 or 6 files produced, and upload it here. In that way the game will be playable directly from the browser.