«☼Snip☼»
The pic is pretty huge, you might want to spoiler it.
First, I really like how you used soft brushes. And the purple, blue and a bit of silver colour palette. I'm a sucker for those
And they do wonders on the background.
The lighting and colours are a bit weird though. The room itself looks like it's completely dark, except the dim light coming from outside of course. That would be fine if it weren't for the Sun behind the window casting light directly in the room. It's not clear though, it may be even a cloud or the Moon. Anyways, the blue light outside suggest it's daylight, while the room is way too dark. Maybe the colours outside the window should be darker too.
As for the character, she looks okay, although not detailed enough. But you said it's only an experiment. The folding on the pajamas is good, but the ones on the sheets are even better. The shoulder is not that off, but should be moved a bit higher. What's more concerning is that ear, it's way too large, and a bit too low.
The pose is also strange. She doesn't look like she's actually sitting on the edge of the bed, but neither like she's just about to stand up.
The last thing that looks off to me is that the branches look like they intertwine with the window bars. Not sure if that's intended or just an opacity mistake.
Anyways, I really like it even though I've been listing only mistakes. But that's what a critique's supposed to do, right? And I'd say your experiment worked, but needs some polish.
omgdon'tlookunderthebed... :c