Nice game. Played it couple of times and it feels 'addictive', so well done. The visuals and audio feel nice and retro.
I assume every run you have a different choice of ships with different weapons?
The Scatter Gun feels too underpowered, primarily because of the initial range. The Arc Generator feels a bit too overpowered because it's omnidirectional (at least the circles are). The Laser feels underpowered because of the extremely low firing rate. I think all weapons might need some balancing.
Do like that every weapon requires a different strategy btw :)
Also, can you implement skipping the start sequence? It becomes a bit old when you just quickly want to dive in there to shoot some more things :) Same goes for the slow counting of the stardust when you die.