I pretty much agree with apiruxb: it's an interesting little idea, but needs a bit more juice to help the player figure out how things have swapped around, and give things a bit more of an impact/consequence.
A small balance notes: It might be my resolution, but when I first started the game in non-fullscreen, I couldn't see the blue gate I was supposed to aim for, so I was pretty lost. I was especially confused when shooting the only things I could see (a black hole) didn't do anything, and driving into it didn't seem to either. When the blackhole eventually sent me back to the start, I initially thought I had beaten the level haha
Also, the levels seem short enough that once I figured out the actual goal, I was able to rush through most of them without having to deal with any controls switching. Not sure if there's a good way around that.