From this point, you need to go all the way to the left of the screen, jump and punch the purple plum which is hanging above you. After you punch the plum, it will fall. Jump on top of it, then jump on to the ledge above. This will allow you to pass the level.
アクセスしようとしたFAQは日本語に翻訳されていないので、英語のFAQが表示されます