After seeing a prototype Nintendo demanded a version of this for DS, but the GBA version is more refined & released later. Daily puzzle mode will last you a year. One-handed control for commuting is genius!

In August 2013 I decided to play through all 365 puzzles and just managed to finish them by New Years. Loved it.

The best puzzle games reveal their brilliance immediately. Spend five minutes in the training mode and you will know Polarium is undeniable.