what did you make the gif with? Looks kind of like what happens when some programs try to compress the size of the gif file.
Every single one of these sprites is colored badly and with way too many colors. Really gonna just have to redo this whole thing.
this would be way better as a sprite sheet. Hardly anyones going to sit and watch all 150 frames when they could just look at it all at once as a sprite sheet. Something messed up with your colors though. And are some of these just colored red/blue sprites though?
Seems like the gif ruined some of the sprites. You should submit this with each sprite side by side