Looks like a good start, they are a little blurry though. What do the look like in a game engine?
This is what one look like for example with a background applied.
What about these?
It's looking more clear. I don't think blury is bad, it just depends on what kind of style you're going for in a game.
I would like to create assets for 2d platformers, but want to make them look different compared to other assets. That why when I paint in krita it looks blurry from the default painting mode when you launch it.