so you don't need to go into the actual mineshaft, you just need access to the top entrance, then follow my previous instructions and you'll find the scene, hope this helps ๐๐ป
I tried going to the left but I'm confused by "there will be a slight indent in the cliff on the right side, land on it and reveal a secret room". I'm going left but there is no "indent" anywhere where I can fall. The only boxes I find by going left are two boxes next to a wall.