Rooted !!!
Really really fun box, it required some understanding of python, which is simply 
This box takes you away from usual approaches to owning which I really liked.
Some HINTS:
Foothold: The page says it all, you have got the file to grab and also the directory told by them. Honestly can be grabbed manually (no fuzzing needed).
User: Simple yet interesting cracking of script, just understand what its doing and reverse it. Everything is given on a silver plate inside the home.
Root: Read the code carefully and exploit the vulnerability of SLEEPING rabit once it stored the important file at some location. Do basic scripting to capture that, since we humans are not that fast, but scripts are 
Still Stuck??? Feel free to DM 