Wow, you actually got past the “wall?”
So, a little context for that… it was supposed to get a texture that looked like an ending for the wall, but the keypad would pull it up into the ceiling with a special sound. The “locked” message there was intentional and supposed to get you thinking about that spot early on so that you would guess that it could be unlocked later. It was done in place of a crawlspace to the final room so that we didn’t have to program crouching or sliding through a tight place. As with the keypad system, implementation is unfinished as you can definitely tell. ._.
The ground mask bug is definitely a problem and can probably be fixed with better collision.
Again, thank you so much for your patience with the upload.