It's a shame that Orbital Blaster's Kickstarter project never saw the light of day. They were asking for about $80k and only raised $2k or so, but this game looks like it rocks... wish I knew about the Kickstarter project when it was online.

The company behind the game, Hashbang Studios, says they were inspired by Contra-type end-of-level bosses and Galaga style gameplay. Lots more on the game here:
Orbital Blaster

The company is looking for ideas for weapons and levels so feel free to share your thoughts below!