Flashing shader is very coooool! It could be used in different situation now I known! 

I like the dithering in the backround.. ;)  the rest though.. ehhm, needs improvement.

You can always post your work in the forums or over on PIxelation. These are good places to get some critique from advanced pixel artists.

Thank for the feedback! The shader is flashing for dramatic effect, like a bomb or gunshot going off. (I imagine he's fleeing some kind of scene). I know it's not perfect but this leads me to the banding;

I did this before I got to the part in Cure's tutorial on banding, technically this is my first piece. I wanted to upload it so in time you guys could get a feel for the progress. (atm I'm working on my dithering, new piece coming this week)

Any obvious easy to fix tips?

I must ask, why is the shading flashing? Also you've used an awful lot of banding, it really lowers the quality of the overall piece. Otherwise it's rather nice!