nice work -- maybe take a look at the fornt wheel seem to be blending into the earth rather than on top -- also the rear wheel is a bit off round -- touch up the masking and this will be better (IMHO)

You might want to reposition the broom so that it is supporting the witch. She looks too obviously in front of, rather than on top of it.

Thanks for yur comments! I have already fixed them, I think it's better now. Check it and tell me! Thank you again!

Looks better.
I really like what you did to the bicycle girl's face, but it's a bit too small for the rest of the body.

Nice work.

I'm sorry, but this is just hilarious.

i love it!!! great idea!