Just finished playing through Shantae: Risky’s Revenge. Nice game, if a little bit short. Very Metroid-style, as I had heard. A little too easy, but then again, Super Metroid is pretty easy too if you’re getting all the items, so that isn’t -too- bad. If you wanted to arbitrarily inflate the difficulty I guess you could do a minimalist run, or a no-potions run, or something like that. Probably not worth it though. Can’t forget that the soundtrack is composed by virt!
Overall, not really a must-play game by any means, but something you may as well check out if you’ve got an iOS device.