So I finally settled on an idea (with the help of @lafolie who gave some good advice). You are a pirate bounty hunter who just robbed something and is now running out of (enemy) space. Protect your ship from the waves of incoming enemies in a run-and-gun like game. I'm hoping to have multiple weapons and such.

I recently started working on the graphics early on. I found it helps a ton for me to get motivated about the idea quickly and helps me get a feel for the entire game from the start. Unfortunately I can get a little obsessive about the small details this way, but I figure motivation is a fair trade off.

EDIT - now that I post this, I notice that the thrusters for the ship are coming out of the wrong spot...