You are a birthday cake. It is somebody's birthday. You must serve yourself to the guests at the party.
Move around with the arrow keys or WASD. During the intro you can only move left or right. During gameplay, you can only push the cake in a specified direction for a limited amount of time, which is reset every time you collide with a guest. You will otherwise bounce around by your own momentum.
Each guest can eat up to three pieces of cake, at which point they will leave because they are full. When you fall off the bottom of the screen, the game is over and you will be taken to the ending, which will include a tally of your score.
Credits are available inside a text file in the download.