Didn't understand what to do but after just moving around for while it clicked. Very simple concept but it was executed well, you should explore this concept further, maybe polish it up and add more levels with obstacles etc.
The UI needs a fix, it's too low quality and seems like it was slapped together. Like I said though, you should explore this idea further, polish the game and UI, add more content/levels and you could have a gem on your hands.