I love this concept! It reminds me of playing the Shawzin minigame in Warframe where you also use WASD + arrows. I had lots of fun since I enjoy rhythm games in general and I would love to play a more difficult chart. It would be great if it was better synced with the music too. Another thing to consider would be darkening the surroundings of the two lanes to help players focus better (though it's usually up to their own preference). Overall this was well polished!