The “last boss” isn’t that hard. You’ll notice it has the same Devil’s Crush sinkholes, and they have the same problem as the Crush games: they suck up the ball, pause for dramatic effect, and then after you’re already bored, spit the ball back out. If these had been kickers that immediately launched the ball back into the playfield, it might be exciting. Instead, they do the opposite of making excitement and just murder the pace of the game.