[ArekDymalski]

Quick suggestion after slight confusion during the Intervals exercise: switch the location of "Hear next" and "Hear again" buttons - it seems to be more intuitive to have "Hear next" on the right side.

[evolve2k]

I came here to say the same thing, kept pressing the wrong button when I did it fast. Yes please swap them so the next button is to the right.

Consider adding a little arrow icon or '>' on the next button just to help remind us. The music button could also have a little music note icon.