Gatamari Escape 24
You're a professional room escaper who just received a new challenge by mail. A helicopter air-lifts you to a remote island where the room is waiting, but getting in may prove to be as difficult as getting out! Such is the setup for Gatamari Escape 24 (by Gatamari, who else?). Navigate around the game world with the mouse, keep your brain in gear, and cross your fingers, because it's going to take luck and/or use of the game's save feature to get the best of the game's four endings.
The text may be in Japanese, but the puzzles aren't; as with the rest of Gatamari's work, everything can be solved without taking a language course. The puzzles are just the right difficulty and require just a wee bit of escape-savvy and thinking outside the box. The game world isn't as expansive as that of Gatamari Escape 23, but that just means it's less of a chore to get from here to there-- and there are lots of things to open and plenty of puzzle-solving to do. It's a great game to kill an hour or more... emphasis on "or more", because it's not hard to get stuck!