Suffice to say, there's no shortage of things to do outside of just running through the stages, and you'll likely find yourself hooked into replaying stages for better scores and
grabbing missed items.
Not exact matches
Jump on top of the
items and you should be able to
grab the skull if you jump into the
missing space on the ceiling.
Like the main game, you can revisit levels to
grab missing key
items, though they're not as plentiful compared to Shantae's.
I found that I would usually
miss a few hidden
items on my first playthrough in a stage, so I could play it again easily to
grab the things I
missed and pick up some more CP upgrades to change my current shot spread.