If anyone has trouble beating the boss, just dash at him (level 1 magic skill). It will get you in range to attack him. When he is knocked back from your attacks, use dash again.
Anyone having a hard time with the monster thing, it's actually incredible easy to kill him. Throw fruit at him, he will spend a couple of seconds eating it, just beat on him. When he is done, just dash jump over him and do the same thing again.
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