Fixed!  Thanks again for letting me know! 

I have.  I was just unaware that I could repost a post that is only slightly altered.  I just assumed that it was a "well, it's too late now" scenario.  Thanks for letting me know.  I will update it accordingly

well, the point of that feedback was for you to take it and use it to improve the piece.

like, you know, remove that outline.

Cool stuff.

8bit is the way to go

Thanks!  Portal 2 does indeed have an awesomely recognizable style.

Thank you so much for the feedback!  I'm so grateful for your help :)

great job!

recognized it immediately 

I like it! may I advise that you avoid using outlines that are lighter than the background (such as on the tan thing on the side. When you do that, you do the exact opposite of what outlines are for, and end up making it softer. Additionally, that is the only thing with an outline, so there would be no harm in removing it.