I messed up plenty playing Galak-Z as well. It took a while just to unlearn Luftrausers flying controls, though that constant fear from imminent danger remains from a multitude of enemies. Peons, Gundam-esque mecha, space spiders. 17-bit's Jake Kazdal explains that Galak-Z has the best AI around.
It's certainly aggressive, with a little bit of wiliness.