I'm not sure I see much of a difference to be honest with you. But I did edit it further, hope you don't mind.
http://www.iaza.com/work/130329C/iaza18870378658600.png

Iaza isn't the best site out there for editing pictures. I would suggest using Pixlr, the site sketcher, to edit your drawings if you don't have an editing program on your computer such as Gimp or Photoshop. All you have to do to fix this problem is to adjust the brightness/contrast slider on your photo editor. There are more advanced ways to do this, but since you seem to not be very savvy on this kind of thing, I'll keep it simple.

Perhaps I could make a tutorial on how to edit your scanned drawings. Not just for you personally, but a tutorial for others to see who may be having a problem with their drawings becoming over exposed or washed out.

Edit: Here is a tutorial. http://www.animationsource.org/board/post1487382.html#p1487382

-edit- I fiddled around with Iaza, tell me if it's easier to see now?

Yea, I could edit them to be darker, but I'm not really sure how (: It's probably because of the scanner and the paper I drew them on. The pad was too big for the scanner and let a lot of light in because the top wasn't all the way down. But until I get around to caring about editing it, tilt your head and squint. It should be a bit easier to make them out.
And, I do draw pretty darkly, at least with ordinary pencil. These however, are colored (;

I'm having a hard time seeing the doodles. They do look nice from what I can see though.

I don't mean to be rude, nor am I attacking you, but I can't help but notice that some of your pencil drawings are too light, and the white backgrounds are hard on the eyes (at least to me anyways). You may want to try drawing more darkly, or edit your drawings to make them darker.

Oh no, I can't see the two at the bottom!

Love Kodi's expression, though. XD

Yes I had fun with his expression.

Lol Kodi XD