Is there a way to open the passage between 2 and 3?
found some bugs: if you don't go to the boss and leave him off screen, you can shoot to your hearts desire and he will not come to you an remain in place. So you can kill him without any hassle. When I first tried the third boss (the dog or fox or what it is) I hit him mid jump (his jump not mine) with the bomb and he froze and his hitbox disappeared. I had to restart from last save.