Wow! I think this might be the coolest game I have played so far! Love the darkness with bright lights. Love the color theme. The music is super subtle which works well for the game. The premise is so neat. And what an awesome addition - if you kick barrels, they kick barrels! Super clever. Gives a nice puzzle aspect to it.
I almost couldn't figure out which way to go because at one point it doesn't look like a path in front of you (it doesn't have the pink map border on the sides), and i had just walked over a hole and there were raised platforms on either side so I thought I was stuck or went the wrong way or the game was unfinished: I just didn't know. I restarted and looked around elsewhere first and didn't see another way to go, then I figured out to go through there. I also had a difficult time getting the enemies to kick barrel sometimes - I'd kick them but they would just stand there (or even kick me sometimes, on accident maybe?) It was a little frustrating trying to move the barrels. Maybe that was not what we were supposed to do, but I tried to push the barrels to the enemies that had none around them and were blocking a long pathway so I could draw them away, but they would roll off the edges. I had a hard enough time controlling the movement as it was with the mouse controlling the way I was facing and moving using keys. It was also really hard to move and see because of the angle of the camera. It would have been nicer to see a little further ahead of you and not so straight down. (just my opinion!)
I hope you plan to flesh this out more! It would be a awesome as a longer game too.
Great use of the the theme! Great job!!