I feel like you have a lovely little base for a smaller commercial game here, the gameplay felt tight ships were varied, with some expansion and sfx mx this could be a lovely little indie game.
Graphic wise it is clean, sprites look different enough to quickly differentiate between ships once you get to know them
SFX and mx are sadly lacking here, for sfx you can use tools like bfxr to generate you stuff in a pinch, or you can record yourself doing beeps and boops and bitcrush it for some oldschool vibe.
Overall, cool little entry, miss me some music though! Well done!