While it is not much, a new Project Mirai trailer for the Nintendo 3DS was released the other day by SEGA. Featuring the backing song YumeYume by Deco*27, it showcases small snippets of gameplay which utilizes primarily button presses which you time with an arrow that travels around in a circular pattern – similar to a clock. Also featured is a (very) brief look at Miku’s Room (From the looks of it) and several costume changes and animations that will be included throughout the songs.
The game is due for release in Japan on the 8th March 2012, however none of these games so far have made it overseas.