The controls work the opposite as expected, especially up/down thrusters. Also, it is hard to play when the game pauses every time a message appears. I wish there was an option to turn off messages or have them display on the side without interrupting the game. Also, it is hard to see the edges of the tunnels, the flickering and transparencies and background all blends everything together. This, combined with the close up view makes it difficult. It would be easier if the view could be zoomed out and the tunnel walls and obstacles were a solid color much darker than the rest.
Otherwise it is kind of fun, a good start.