Good stuff!

The first 'doodle' is a great use of symmetry, and great color usage. I also feel a Native American tilt to it.

Batman is good, but he looks more like the newer version that's on TV now (my kids watch it), where I always preferred the older version.
Holy Art Critic, Batman!

I like the moon in the ghost pic. You could use that same fill to make some dark clouds across the sky, and maybe cut out the ghost's facial features and let the background show through.

Your "Plastic Display"is very good. Looks like that plastic they put in American car dashboards!
It would make a nice banner for a pager company.

"Trees" is just great!

And your little sweet thang! Hummina Hummina!

Your bowl looks excellent at first take. But something does seem off when I study it. Could the lip of the bowl need a little tweaking to show some perspective? Shouldn't the back edge, being furthest from the POV, be skinnier than the front, with the sides tapering between them? Or is the backside a little too tall? I struggle with that anytime I have a round perspective.

Hope I helped. You always do such wonderful work.

"I'm not an artist, but I play one on the internet!"