Board can now be generated in any combination of 90 and 45 degree axes.
Usage: /startgame <x> <y> <z> [m1x m1y m2x m2y m3x m3y]
Recommended values are -1, 0 and 1 but you can input any value.
If this is confusing, you can still use the standard command that defaults to +x and -y, and take a look at some of the presets.
Added debug mode that shows all these possible board orientations, and it looks like a giant snowflake, you can generate it with /startgame x y z debug, where xyz is center point

PRESETS/EXAMPLES for [m1x m1y m2x m2y m3x m3y]:
Positive x, negative y (default)
1 0 0 -1 0 0
Positive z, negative y (turned 90 degrees from default)
0 0 0 -1 1 0
Positive x, positive z (table lays flat down)
1 0 0 0 0 1