Simple
So this was cool I like the simple nature of this one and it seems to be another one of your faster drawings, this time at 5 seconds. I think for 5 seconds this is actually pretty decent but too simple. I think you could have set the background color quick to be blue and then did a bit of green on the bottom portion. I bet you could save time by not signing the piece to give it a little extra. I mean, for a 5 second drawing, do you really need to have the signature?
~~THINGS TO IMPROVE ON~~
Some background effort and detail
~X~