Movement of the penguin which the player operates uses the acceleration sensor which a smartphone has built-in.
Player must destroy all targets(aliens) before a time limit.
You can play this game until it becomes game over.
This app has the World Ranking.
Here is the detailed explanation: http://www.penpens.info/pens3_help.html
※The resolution of the smartphone is available only at the terminal which is near to 800 X 480(WVGA), 854 X 480(FWVGA), 1920 X 1080(FHD).