A game with various puzzles

It's stage-based, but since each stage has about 3 levels, you can enjoy a variety of gameplay. There are some pretty difficult stages or puzzles, but you can skip them if you can't solve them, and there are no 3-star ratings, so it's great if you want to play casually. You can also play specific puzzles individually. Of course, you'll need to use your brain more as you progress, but it's still good for casual play.