Sorry, I was pretty tired when submitting it and neglected to add instructions and such.  The premise is pretty simple but not obvious...the player is in factory in the sky working on an assembly line  The goal is to basically hit the cube when it's directly over the square (I was going to add  another shape to "assemble" it to, but ran out of time).  If you hit the cube outside of the square, the fog increases slightly making it harder to see the next cube coming.  The cube also speeds up after each cycle, whether or not the player hits it.  

I noticed that it's a bit too difficult though, so I'll be updating it shortly to fix that, to add some zoom limitations on the camera, and to remove that default cloud texture that I was using as a placeholder.   Thanks for the feedback :)