Very entertaining variation on the "endless running" genre, pioneered by Canabalt. Navigating dozends of joggers at once is much deeper than I expected it to be, and the various stages are different enough from each other to justify the purchase. The stages start off slowly but the difficulty picks up very quickly, and the multi-leveled nature of the stages with the many pitfalls and hazards makes this a game that is very satisfying to play, but allows for more mistakes like most other endless-style games while still keeping the gameplay tight. The touch controls are very precise, the graphics are nicely done (I really love how the joggers look when they all start running) and little details like the "last man standing" music and the quite gory but still cute death animations make this a very polished and unique entry in the quite crowded genre.
MagneticOlives about Grim Joggers, v1.2.0