Wow thanks for such a detailed response, I'll look into this and get back to you. Glad you got to play tier 3 :)
Alright, so I tried Version 0.4 on my Windows machine and this time I manage to complete mountain (and the two before it) with no issues whatsoever. I haven't tried peninsula yet, but I'm pretty confident it'll work as well!
So: Yay for no getting stuck!
Good job!