Sneak Peak of my Upcoming Story Board(Almost Done)

I COULD REALLY USE SOME CONSTRUCTIVE FEEDBACK IN THE COMMENTS, PLEASE!

*v*READ DESCRIPTION*v*
I was going to wait until I was finished but got too excited and wanted to know what you guys think!

This is a very early drawing I have made of a photo that is found in my storyboard and fades to a past event (confusing I know).
It is set to take place during the Great Mushroom War and will feature:
- Finn's (great, great, etc...) Grandfather (Blonde hair, top and center)
- Marceline
- Ice King
- Hunson Abadeer
- The Lich
- Death might stop by
- The Business Men may also have a bit part

I have to change a lot to fit the Ice King in with Marceline since I started before "I Remember You."

* Sorry for not just edditing the previous one; I can't figure it out (I'm still new)
** Also this is one of my big projects, PLEASE don't copy it; I don't want to have to start putting watermarks on my pictures; maybe when I'm done.
*** I take commission as well, feel free to ask

**** Just to avoid any confusion, the "Almost Done" in the title is referring to the picture itself. The Storyboard, on the other hand, is far from completion.

oh yea, this is for Pen Ward's Adventure Time (not mine)