...if you had bothered to read the Author's Notes, you would have seen, in plain sight, that there is a INVERT Y-AXIS option when you click OPTIONS. Games work best when you read first.
Now, onto the review.
It's an easy game, but it gets harder when you go along. And the Invert Y-Axis tool really helped a lot (I don't like flight sim-style controls too much) . It's a good game; I'd recommend it to any of my friends who are bored out of their brains. Have fun making more!