Pushmo is a highly-acclaimed puzzle platformer game for the Nintendo 3DS, featuring 198 unique puzzles and a level editor that allows for virtually endless possibilities. With five difficulty levels, both novice players and masters can enjoy the game. Pushmo is fun and colorful, and it really offers you a good time. It costs $6.99 on the Nintendo eShop, and it's worth every cent of it.
Here are the QR codes for two of my custom levels, for those who already own the game: