Thank you for your comment. So today I tried to fix that what you said. Now looks a bit better :D It's my second animation that I've ever made so imo it's not that bad xD Anyway, I didn't want do to shading because when I do it, it looks weird (I need to practise more). Thanks again for advices ;)
I think resizing it back to 1x instead of 5x would do the trick. Agreed with what Eggy has pointed out so far, some shading would look nice.
It is a nice sprite though, reminds me of something from Wall-E ;)
Your sprite is too big for the challenge; yours is 250 x 350 and the max allowed is 80 x100 (either horizontal or vertical).
Other than that, the sprite could use some shading (unless you're going for that style I like to call "simplistic") and the animation could use some work because it looks kinda choppy. Also, I see jaggies near the top and bottom that need fixing 
Dunno how to explain the last one
Thanks for comment. Yep, it looks like Eve :D