I don't know is its a valid topic, but some people have played it on osu!, and I cant find it anywhere. So where an I find it..? 
forum
[invalid] Rainbow Factory?
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Topic Starter
no. please read the announcements (t/1640) before posting next time 
also, https://osu.ppy.sh/p/beatmaplist?q=rain ... 0&la=0&ra=
also, https://osu.ppy.sh/p/beatmaplist?q=rain ... 0&la=0&ra=
invalid.