Nice

Typo: loot = look

Ok good you mentioned the message At the beginning of every art there is a message. So, you can use certain techniques to support that message. We certainly should rate your art within that context. (Climate change is no joke as you know, and the boomers are messing it up and leaving us a planet with severe climate change impact.) Message The character is sitting on top of the earth and doesn't seem to be worried at all about what is going to happen with it.

Details I don't think you need more detail to make the message clear. I think the buildings in the background should get some windows/lights (even if it's painful to draw all of em). It will improve the overall atmosphere of your art and you can connect the usage of electricity back to climate change. Also you make the city/skyscaper stuff more convincing. About the empty spaces: Empty space is a design tool just like non-empty space. IMO there are no large empty spaces that look awkward, because where is the focus? On the earth and the character and both are placed pretty much in the center of the image, so there's no problem. When you make the buildings more detailed you as well could add more leaves to the bushes, but it's not a must do. Always look at: Is the overall detail balanced? Currently, it is. But when you add detail to the building you should add detail to the plants and clothes as well..

Perspective Since you have a pretty clear message, perspective is a thing you can use to make for example more dramatic and stuff. At the moment, the perspective is really relaxing for the eye, not to say wholesome. It's because of the viewer is more far away and the perspective becomes more even. If the viewer for example would move closer to the earth, it would appar bigger and the character smaller. One could add more detal to the earth and show the climate effects. Or the viewer would move towards your character and the character would appear bigger, it would seem like a "heavy burden" for the small earth. Artstyle Okay, it's not a secret many of us like Manga/Anime style of drawing, so I consider that style to be one of your goals. IMO this is pretty convincing in that regard. The wings are very stylized so that I don't understand what kind of wings they are. I would suggest you reference some realistic animal wings while drawing them.

Outlines The folds of the clothes are convincing, and the hair is not over the top as well, which is good for that style. I would tidy it up at the hat, and zoom in to erase overlapping color. Shading It is there, which is good as well. But the same applies here: How can you use shading to underline your message. Furthermore ask yourself where is the lightsource coming from? Draw the highlights in that direction. I would add a drop shadow on the earth, which is almost everything there, except the earth itself is the lightsource here. BTW: If you add a shadow on the plants in the middle, they would seem to be a bit more abandoned and dark.

Colors In general the saturation of your palette is not too high, which is a good thing as it's pleasing for the eye. I think the shirt and pants are too dark, let me explain: There is shading but it's not easy for the eye to really distinguish the shades you really have to focus on it. If it's not intended the only effect that get you, is that it's harder to grasp the overall shape of your character. Overall I think it's a bit too wholesome for the message and you can indeed use shading, lighting and detail to change that a bit. Perspective would help the most but that would mean to draw a new art piece, so, that's not a option.

If something is unclear, let me know :)

This is a review coming from this post