wow thats good for first.. smoke needs work, try and fade it out like trying to merge it with background somehow, and on the tree(which you did a very good job on) you might wanna add a big branch coming up from the middle ? kinda looks like a big guy sat on it and it got pushed down, and whats the thing on the far left? is it a cloud? if it is, should be a lil darker :P (sry if this sounds harsh, its really good sig, just wanna give pointers though!)