Feedback on my GFX

This is a GFX for my best friend since primary school!

It’s a nice render but you should add a background because it looks bland.

Needs more detail then just a orange box

I’m not sure why it looks like he’s dead but why there’s a random light source behind him and doesn’t spread? And btw it look like a a brown cardboard it in a orange box not gonna lie it’s pretty cool no offense what do you use blender?

There’s very little going on, although it is seen as minimalist, this can be improved.
The character is standing on a flat plane, you could have added more to the scene. For example, since this is for a friend you could have put a car, him holding a sword, etc.