Oh man this is fantastic! Really dig the atmosphere you captured (rocking that hollow knight inspiration I see haha) the feel of the game is just really good, the sound fx of the armor and that little screenshake when it lands in particular really sell it being heavy and solid. The core mechanic is quite cool, but, the ways you implemented it are what really sell it, using it to launch the armor into the air and drag it along while you platform through small tunnels with the head are excellent.
I would really love to see more from this concept, expanded upon and developed out further. Great work!