Great use of the different colors. The red and blue contrast really adds that extra element of light.
I love the creative characters. As far as expression and lighting, the fire scene is my fav, it really gets across a sense of shadow and light. The mix of red and blue helps with that nicely as well.
Bethany,You sense of caricature is on display here and it's enjoyable to see. The line is loose and fluid - although I'd like to see you working in a larger sketchbook.As far as the shading goes, you're thinking a little too much like a technician. Line fills that run in a consistent direction certainly are a valid way to block in a value pattern, but I'd like to see you lay the shading in the same way you put your contours in - draw with the contours, not against them... and stay loose.