The lightning is really cool looking, but it does look unfinished. The grass could use a bit more detail, but it's not that big a deal. Mainly what I'm looking at is the moon and the overall impact. It's not just that the moon is rough. Basically what you have is a tower on a hill in the middle of a black void being struck by lightning. While the lightning looks perfect, and the top of the tower is fine, the rest of it seems like it was cut out and pasted onto a black square. Only the lightning looks like it belongs. A background would certainly help,even if it's just more hills. that would really push the tower and it's hill forward and add some depth the the picture. In addition, the moon seems out of place. What it looks like to me is that you did the lightning first, then the tower and hill, and then, thinking it was lacking, hastily threw a moon in the corner. I see that you did this quickly, and think you did a good job, but you should always plan ahead keeping in mind the time you have, and don't make it up as you go along so much. Instead of a moon, it would have made much more sense to have clouds in the sky, and this would have helped the composition as well as adding interest to the otherwise plain black sky. If you had spent more time on the rest of the piece, it probably would have been my favorite. I hope the criticism is helpful. Remember, don't be afraid to take your time!

The lightning is great... I think the grass could use 1 or 2 more shades of green.

..........Great work.

Wow. That was pretty effing fast. And well executed!

Damn, you win for fastest challenge turnaround.  I think the lightning is perfect, but I do agree with Liman that the moon looks a bit rough although I think the grass looks just fine.

Love the lightning and overall it's a cool concept but I think it looks a bit unfinished if you look at the grass and the moon since neither is as detailed as the top of the tower is. Still cool though.