The 1st and 2nd boss are playable. The 1st boss, and all of its components, are completely playable. The 2nd boss is playable and defeatable, but will not have an ending. The 3rd boss can be seen by a button you find near the command blocks. I won't tell you as you have to find it yourself, as if you were looking through game files to see what would come next. In some games, they have events that happen after a certain period of time, and by looking in the game files, you can see what those events are. This is similar. You have to look through the code in order to see what I've been doing
