This game is slander. I completed more laps of the Pacer test back in the day.
On a more serious note, this game was pretty well executed and fun! Couple of notes: I found it hard to pay attention to the stopwatch and the bar at the same time. Maybe you could make them closer together so that you can keep track of time while playing. The stamina system also felt a little unintuitive: I think it would make sense if you regained some stamina for finishing a lap early, and also it wasn't clear to me from the tutorial that I would lose stamina naturally, so I was confused why I ran out of stamina even when I was only executing perfects. Lastly, having music that slows down with your stamina bar to make each perfect fall on the downbeat would really sell this game, though I imagine that wouldn't be particularly easy to develop.