Quite frankly, this isn't that good of a game. I can only guess a majority of the time went to the custom engine (I assumed its a custom engine you made and not some obscure one), but if its not then wow. The sprites aren't set to nearest filtering, making everything have this blurry look, the notes don't feel lined up with the song, it can be kind of difficult to see the notes oncoming because of the previously mentioned blurriness and their small size