not bad. first time I played, I had a really hard time even starting the game. it was stuck on the screen where you select leaderboard or play. I had to reload the game with F5 and try again.
It moved so quick that for the first few tries, I didn't realize you basically already had to be pressing down D or you'd lose within a second. Once I got the controls down, it was pretty fun. I liked the online leaderboard. I won a bronze medal!