This is a casual rhythm game.
There are only two characters: Mr. monster from the far far cold lands, and its shaggy heart, which is running away from mr. monster.
The goal of the game is to keep the rhythm touching the left and right side of the screen in order to make the character run or jump constantly. If our little shaggy heart gets caught by mr. monster, the game is over.
When the red light at the left side of the screen is on, the player must touch that side of the screen.
When the yellow light at the right side of the screen is on, the player must touch that side of the screen.
That will make the player keep the rhythm of the music and it will sound pretty good. If the player fails with the mechanic discribed above, the music will get unsynchronized with the rhythm and it will sound pretty weird. When this happens, Mr. Monster will run faster.
If Mr. Monster catches shaggy heart, the game is over.