One interesting thing I've noticed is that sometimes the wind effect works for you, sometimes against you. Presumably the wind direction is randomized. If you're facing the wind direction things are slightly more difficult. If you're moving with the wind, things are easier. Some enemies really seem to struggle against the wind, with their projectiles getting blown behind them the moment they shoot. It might be making these enemies a little too easy, but then again if the wind is going the other way they are harder. It makes the end of the levels a little more interesting. Still testing, but seems pretty good.