Sprite is a simple game for 2 players that can be played with a Shibumi set. It uses a n×n set of stacking spheres in 3 colors (4×4 is recommended, but larger sets can be used).
A 4×4 set, for example, is a pyramid of 30 marbles:
4×4=16 on the first layer
3×3=9 on the second layer
2×2=4 on the third layer
1×1=1 on the fourth layer
The board (n×n) starts empty.
Players take turns placing 2 balls, one at a time.
Players score points based on the number of balls of a certain colour that the ball just placed touches.
The score is tracked as a difference between the players.
The player with more points when the pyramid is complete is the winner.
Detailed rules can be found in the "files" section.