I'm doing a live stream tomorrow where I will attempt to make an Asteroids clone (in Mini Micro) in under an hour.  But art time doesn't count!  So I made these vector-style sprites:

https://opengameart.org/content/asteroids-vector-style-sprites

Come join me tomorrow and cheer me on!  See the schedule in your own time zone at: https://www.twitch.tv/joestrout/schedule

And, I hope you find these sprites useful in your own projects too.