I do agree with the comments of Gooseman and drew, both a volume control of the game and the ability to get our fifth slot filled earlier on would be nice. I find it kind of frustrating when I am going up against five minions of the level of my minions and have my rear handed to me because I am lacking one minion in comparison to the enemy. I would also not mind seeing a pause button for when nature calls in the middle of a bout lol.
for insane the ship's armor becomes 1, that is why it is insane mode, 1 hit and you're dead. I have also noticed that the insane bosses seem much easier that they are for slow, normal, and hard.
very nice detail to the game, every once in a while, camera seems to get stuck and i have to reload the game. All in all, i am enjoying it rather well. :)