This is easily the most impossible game..
Easy mode was a joke. Medium's boss was tough, not because of the boss itself, but the 30 drones that come onscreen per second, firing away at you. Hard mode will be the death of my sanity. Extra mode - controlling two characters at once is impossible, and making them die when they bump into each other made it that much worse.
The concept is great. I love overhead shooters, and I love the rotation idea. However, the controls are extremely cramped [ASDF and CV and Space? Really?] It could have been made much easier if the game was controlled by a mouse and the keyboard [a la mouse movement controls the ship, and the arrow keys or A and D rotate the ship] The password system is strange also.
I understand that this is a parody of sorts, as you said, but it doesn't make up for the fact that the controls are absolutely horrid and the hard modes are downright impossible.. and this is coming from someone who loves when a game pisses me off to the point where I want to break things. This game makes me want to kill small children at times.
Improve the controls, and my score will go way up. Improve the medals by not making them all secret [give us a little insight, yeah?] and ease up, just a tad, on the difficulty on Hard and Extra modes [especially Extra, by making it to where the two characters colliding doesn't kill them] and little things like that.
Otherwise, this could be a much more enjoyable game. The music is fun and quirky, the concept is A+, and the challenge quality is great, but the few flaws this game has sadly and very brutally outshines the good aspects.