Ahh then it must be my computer. Cause the one on pixeljoint looks like it got anti-alaising almost very blurry and the other one is more smoother, But anyway thanks for the input il work on it ASAP!
Thank you for the tips! i'll defs check it out! Although for some reason the quality went very bad when I uploaded it. It actually looks a lot better. Check here for example https://imgpile.com/i/nUMkUl
At first, I thought this was an incorrectly resized image because it looked like some pixels were 2x2 and some were 1x1.
This is very blocky and could use a smoothing pass.
On a more nitpicky note, the way the rock highlights in the black in the foreground line up looks very artificial. Shift some of them over a bit so that they're not so perfectly aligned with the rocks above them.
It's hard to tell what's foreground/playable and what's background/decoration in this, everything blends together. Try making the background rocks lighter in colour. You could also hue-shift them towards the ambient colour of the level (perhaps towards blue, since that's the colour of the sky).
Oh, that's just your computer or browser (Edge, by any chance?), probably blurring things when zooming them.