Abstract, cement mixer Kirby

[Star]

It's good that you're experimenting, but I wouldn't call it abstract art. Abstract are is simple but complex in it's own way. It's hard to explain, I'm not the best one to explain it. Your dithering on your headband is wrong but you're on the right direction. You need to make the dark side of the headband darker.
For you shading, I would suggest giving it more contrast and making it look less gradient. You can barely see the shading on it. Try to smoothen out your lines too, they're blocky.

Sell out a sprite? Well first off, you gotta make something that "WOWS" people. Then after a while, make animations for that sprite to make a sheet. I guess that's what you meant by sell out lol
Overall, this piece is kinda boring but like I said, it's good that you're experimenting. You gotta start somewhere. I know how you said you didn't put much effort in it, but please next time, put more effort in it. I hate it when people don't push themselves and don't put much effort into things.