Great game to kill time.
Gameplay - collect the dot and also the fruits in each level to collect achievements. Avoid the ghost unless you have a big dot and you can eat them and get points.
Achievements - simple as collecting the fruits throughout the levels or eating all ghosts with the big dots. Do it 4 times and open another achievement.
Overall- this game is good to go. Especially for 400 Microsoft points. Go a head download the demo and if it satisfies you get the game.