Osu! Tatakae Ouendan was a Rhythm Game released in 2005 for the Nintendo DS, its a game where you tap circles along to a beat, soon after its release a PC version was put into development by Dean Herbert, AKA Peppy by the community. If you want to know more about the game I briefly spoke about it in my History of Rhythm Games Article, but that is unrelated.
On Logitech’s UK twitter account they recently released a web game called Lightspeed Challenge, which is basically just a poorly done Osu! clone, the tweet announcing it is shown below.
One user pointed this out in the replies of the tweet, and the account tried hiding the tweet, it seems like they were trying to hide the fact that its an Ouendan clone for whatever reason. After the tweet gained some interactions a few days after it was posted, people started to look through the actual site where the web game was hosted on, one twitter user found that Logitech wrote a .osu parser, which is the file the Beatmaps are held in for the Osu! PC game, from what it looks like Logitech decided to make the Beatmap in the Beatmap editor which is built into the Osu! game and, once again tried to hide the fact that they did so.
After this came to light, people started fiddling with the site and figured out a way to throw popular beatmaps into the site, instructions to do so can be found here.
Its a bit strange that they decided to do this, rather than just hosting a challenge in the game itself, which would have actually had ALOT more people participating in the challenge, what they’re doing is really counter productive to them hosting this type of challenge.