I just re-discovered this game heart
It's basically the online PC version of Osu! Tatakae! Ouendan!, or Elite Beat Agents.
I remember a while back CR featured one of the tracks, which was Queen's Don't Stop Me Now set to a PW background vid (which was inspired by a fanfic). They have a lot of other good Ace Attorney tracks too.
You can download the client here.
It takes a few tries to get used to it, as a mouse really isn't the ideal tool to play this game. It's easier if you set your cursor speed to a faster setting, or you can set the in-game cursor too.
You can also play this game on a tablet, which really is the ideal tool since it's basically a huge touch screen.