Completed the demo in Firefox browser, on Mac, with no issues. Really cute color scheme and sprites, the very last part of the demo was kind of hilariously ominous.
My only suggestion / request is maybe making the non-player dashed circles either a slightly different color or slightly lower opacity than the player / mouse circle? When I crossed over a rain or sprinkler circle I kept losing my circle, especially when three or more overlapped.
Also, the music is gorgeous. Is there somewhere we can download it?