Wow, those mountains look great, nice work! Where did you paint it? I've never used real paint in my house, do you have some space set up at home or did you do it elsewhere?
Alright, the character: The pose isn't really working. Is he standing still or walking? Either way, he's about to fall onto his face. Standing won't work because the weight needs to be balanced. But walking is really just controlled falling, I just don't like how there's no indication of leg movement.
If it's a standing/leaning pose, then move his left leg forward to take the weight. If he's walking, then lift his right leg so that it looks like he's gonna move it forward. Maybe have his toes on the ground but his heel lifted like he's pushing off. Both feet are planted on the ground right now. You might see this when someone is walking but it looks unnatural for a still image.