Koridora

Too hard. Bad for casual people. At least make Stage 1~7 not so tryhard. Maybe add more revives and reduce boss' HP and Defense by a significant amount. Or add a way to craft Red Crystals using low tier ones.

I believe that the cost for the tuning plugs and equalizers should be nerfed. They're actually quite expensive compared to the rest of the stuff in the event shop. Other than that, event seems pretty solid.