I seem to be writing a lot about Monument Valley lately, but I really love this game. The puzzles are just hard enough and the way each level unfolds delights me. I've finished the recent Forgotten Shores expansion and assumed I'd have to wait awhile before getting my next fix. I was wrong. The developers have released a new level as part of Apple's Project (red). It costs just 99 cents, supports AIDS research, and is a lot of fun.