This one starts deceptively simple but there are layers to it. I wasn't expecting powerups to appear!
The powerups are nice but I'd like an indication of what they will do - sometimes I will have a weapon that's working for me and then accidentally get one I don't like as much.
I appreciate the attention to detail of things like the smoothed out red flashes when you hit something and the enemy ships conveying a sense of warping in and stopping suddenly.