Wendy's bedroom

Hey Alex, here are some thoughts on your bedroom piece.  Again, considering you're studying something slightly different to me and there might be different "rules," not everything I say will necessarily be applicable.  In fact, I'm just going to use this disclaimer for all future critiques, rather than typing it out each time. haha. Just keep that in mind for all future critiques.

The thing that really jumps out to me the most is perspective.  There doesn't seem to be any universal vanishing point. Several angles go to different vanishing points, and some don't even seem to rest on the horizon line (particularly chair and the wall closest to peter.  This makes the scene feel fake, like it's s set design for a stage or something, and the window isn't real, but painted on a backdrop.  Along with the perspective issues, the curves on the chair peter's sitting in looks wonky.  It'd be best to grid this off and get the arch exactly right—this is way too close to the focal point to just fudge it.

I like the suggested detail in the foreground, but it bugs me how much clearer it is than the rug wendy's sitting on.  That area on the floor looks really muddy/unclear, when it should have more detail since that's where the focus of the scene is, especially the area on the floor where the light is shining.  I like the attention of detail in the foreground, but remember if you have that much clarity on something that's supposed to be in shadow and out of focus, that raises the bar for the areas that are in focus/near light.

Also, you probably this, but the light doesn't make perfect sense.  Obviously, peter's shadow doesn't count, but the chair's shadow doesn't really make sense.  This may be intentional thought, because the shadow would fall toward Wendy and wouldn't have that nice "spotlight effect" you have going right now.  I think these things you can get away with more in animation, just wanted to make sure you're aware.

Otherwise, great color and composition. It's got a nice painterly feel.  Peter's expression is much better.  I'd say the most important thing to fix the the perspective though.  If you're not trying to go for a realistic perspective, be clear in the style of perspective you're going for.