While the title of this page is official, it comes from a non-English source. If an official name from an English source is found, the page should be moved to its appropriate title.
This game is structured on a grid with two pathways, the upper path labeled 十ボタン (+ Button?), the lower labeled Aボタン (A Button?). Before the player starts, a rhythm is tapped out, using a bass drum to represent the lower path and a snare drum to represent the upper path. After this finishes, Akai Mono roll out, requiring the player to repeat the given pattern using ✚ and Ⓐ for the upper and lower row respectively. After the pattern is repeated, a new one is tapped out. The patterns sometimes vary between paths.
This game appears to have inspired multiple aspects of Built to Scale in both Rhythm Heaven and Rhythm Heaven Fever, such as the general art design. Thus it can be considered a predecessor of those games.
This is one of the few games that doesn't feature a Practice.
It did, however, get a "How to Play" demonstration in the arcade version. Interestingly, the drum sound for when a block on the lower lane appears is different to what is heard during gameplay.