Love your moose character and your overall style. I like the mountains - gives a sense of place.
Is the mountain on the opposite hill is meant to be fire ravaged? (looks a bit ashy and dead) Or heavily logged so it's very sparsely populated with trees? Because that's a bit how it looks to me. Almost as if the moose is in danger of losing his environment which might well be part of the story! If that's the case, I'd say the mountain is an integral part of the story. It's just a question of when you choose to reveal it.
EDIT: I've since seen your chain saw sketch - so heavily logged it is! Perhaps need to make it clearer that it's logging that's taking place - eg show some tree stumps. At the moment the mountain looks fire ravaged to me. The rather sick looking tree closest to the moose - is that meant to be logged as well? Perhaps a healthy tree would be a better contrast?