You could add a Ninja Dueling mode, you VS CPU and see who can slice fruit the quickest. Maybe like the Speed Slice mode on Wii Sports Resort? EDIT: also add some fruit that can be sliced multiple times!
Update 1.21 has been submitted for review! Content is nowhere near the amoiunt of 1.2, but there are a few extra goodies to sink your teeth into. Plus a new fruit! Whoever guesses the new fruit first will score TWO promo codes to give to their friends and family! Also, we're working on 1.3 as I type this. Now, THAT will be a truly magnificent update...