It just looks really rough. Your lines are pretty sketchy and inconsistent.
Point to note on skies, next time it's a nice blue sky out, take a look and you'll see the lighter colours are at the bottom. Just a simple tip ;)
For the blob character, the grey is a really boring colour choice. And it should look a little more blob like rather than just wrinkled where he's touching ground.
Note on your response to kirbyfighter12's review.
He was giving advice. You aren't going to make any friends here if you treat people poorly.
"while your stupid"
"Well, you're stupid."
Well, not while. You're for you are.