i found boss number 3 to be unbeatable. im sure theres a way to do it i just found it too hard and time eating to do so (since i beat bosses 4 and 5 rather fast) its just during the 2nd pat after you get boss number 3's health bar down the first time. his attacks become focused at you, and due to the fact they close together there is 0 chance of weaving through them like on the other bosses. the only way i was able to do any damage was by going around him in a big circle and then only a few shots were able to hit due to the wide range of his attack. this is only my feedback im sure others found him to be no challang at all, but thats all i have to say. other than that the other bosses were beatable and fair. the game overll was fun as well, loved the music.