woot woot! Making progress. Took me a while to figure out what was going on here, so yeah... maybe I'll help contribute to those docs. : D
The biggest challenges for me were understanding player placement, that there is no "goal" marker, what in the world that key is (do I even understand it now?), and why my player couldn't move anywhere ... that owing to the empty blocked tile. : P
Also, I'm guessing signs just don't work yet? Otherwise, add that to the list of things I don't understand.
Work in progress that'll have ya traverse back up the waterfall is here.