Hello there! The lighting looks a little odd because, even though the light source is coming from the right side, the character isn't being shaded according to the direction of the light. Ideally, the face and the entire front side of the character should remain in shadow, while only the sides should be illuminated. This way, the lighting will feel more consistent and believable. :) You could also shade the ribbons hanging in front of the character to suggest a bit more depth. I would also add a little more light to the ground and cast the jelly's shadow onto it. Also, notice that I slightly overexposed the sky to draw less attention to it and create a stronger sense of depth. Hope this helps! :)

maybe keep the environment shapes simpler at first, then add the small details once the foreground and background read clearly