• Listen to a song and click the "Tap Tempo" (or just press spacebar) on the beat to measure the tempo
• The window is draggable (click anywhere outside of the button)
• "Accuracy" currently just counts from 0-30 taps (this will be improved later, but 30 taps is usually enough for an accurate reading)
• If more than 2.5 seconds pass between taps, a new tempo reading is started (so you can start tapping a new tempo without having to reload the page)