In the future i would suggest expanding the rate toggle from a static 0.5/0.75/1/1.5x -> rate adjustable slider going from 0.5-2x considering lazer has up to 2x speed natively. Also the ability to upload a custom skin that overrides the default note elements could be a neat addition later on. Otherwise everything else about this tool for previewing maps on the fly, w/o having to launch osu, has been very useful, and especially support for viewing non-standard maps is a big plus