I hope you're into time management games - because most of my favorites are TM games - not necessarily the flippy types. I think you should check out: - Miriel the Magical Merchant - Home Sweet Home - Hospital Havoc - Plushed - Are You Alright? - Farm Frenzy 1 and 2 - Bar Rush Unlimited - Anna Montana - Airport Mania - Shot Bar As for tower defense games that are pretty cute, you should try: - Battle of Puppets - Slug Wars - The Creeps Here are some nice puzzle games, too: - Super Juicy - Jacques & Stella's Mystery Files club - Tipoli (this is really nice!) - Bar Defender - Kingdom of Gnester Now, for tycoon style games: - Hotel Alawar - A-Yo Sushi Master (also with TM elements) - Karnival My favorite from the Dash series is still Cooking Dash - one of the more challenging TM games, in my opinion. But if you really want it difficult, I highly recommend Hospital Havoc. You might want to check out Mystic Emporium which is coming out soon
What came to my mind immediately was Rolando 1 and 2. Awesome games, and they are quite cheap now. R1 is more challenging if that's what you want...
Bounce On is a totally cute and fun platform. I love it and it's challenging. Also, Plushed is pretty cute, but personally I think it's not as much fun. Toki Tori is very cute, but you have to like puzzle games.