They're nice, and good job on them since they can be time consuming, but it's not so hard to copy pixel images from another source.
What would be really, really impressive would be to go into a program, such as MSPaint or Paint.net and create some of your own pixel images. Then, re-create those in Blockland. That way, they're original, and It's then possible for you to decide to create your colourset in order to do that.
It's probably a good idea for practice in the long run. Allways good to know something new.
Anyways, I'm going to say 7/10, since I've tried pixel art from games such as the Mario ones, and they can be time consuming and slightly difficult if you don't have correct colours, in which case you have to improvise. Well done.