A Dance of Fire and Ice is a simple one-button rhythm game.
Press on every beat of the music to move in a line.
Every pattern has its own rhythm to it. It can get difficult. This game is purely based on rhythm, so use your ears more than your sight.
Note that it is quite strict and unforgiving, so please play the online version here if you're not sure if this is for you! If you've played the Rhythm Heaven series - this is about as strict as that.