One Switch Controllers
Since 12 orbits requires only one button per player, it is a natural fit for One Switch controllers. To make the menus accessible as well, there is an additional input mode. It can be activated by pressing the spacebar five times in a row, while the main menu screen is shown (the first screen that comes up after the credits). A new overlay bar will appear on the top of the screen and give further instructions.
One Switch Edition
There also is a dedicated One Switch Edition of 12 orbits. It's got all the same features as the standard edition, but also includes a few more instructions and activates the One Switch Mode by default. If you use a One Switch controller or play with someone who does, just contact me to get the One Switch Edition for free.
If you have never heard of One Switch gaming and would like to know more, oneswitch.org.uk is a good place to start.