The idea is that the screen is filled with Smirkers, which all have different moods. You control the happy green one and you must fire yourself at the other Smirkers until they are all happy and green. It isn't quite that simple though as you will see in the video. The early stages get you to grips with it but later on there are black Smirkers in the game and these change your mood if you collide with them. If you manage to lose all the green Smirkers it's game over.
It's a bit of a hard one to describe to be honest but very enjoyable to play. The game has been 'Built for BlackBerry' you will be pleased to hear and price wise it will set you back £0.75/$0.99 which is pretty good value if you ask me.
Just don't blame me if you get addicted - I'm just the blogger!