Good idea, I'll try to incorporate more sophisticated controls options in the next build.
There will be some imbalance between the arrow keys and gamepad players (the full 360° angle control of an analog stick is a big benefit), but you can resolve that part in meatspace by rotating controllers if you wanted to play tournament-style. ;)
Glad to hear you might be up for the idea, and yeah I hadn't thought about the balance side of things, although to be honest I cant imagine taking it too competitively, 90% of the satisfaction is the physics, for me anyway!
If your intending to add to the game I would be interested to see some more complexities to gameplay, for instance, game modes like capture the marble? Or if your domino trail length was not capped, and maybe with a bigger table you could set traps with your trail. Maybe if you could switch to control any of your placed dominoes this could make it more tactical too? If you could jump you might even be able to make towers, although the practicality of this I'm not sure.
Anyways, just ideas
Updated with dynamic controls assignment, which should let you play with any combination of (up to 3) keyboard and gamepad players (up to a total of 6). Whatever input you use first automatically maps to player 1, the next to player 2, the next to player 3 (spawned on demand), and so on.
Please let me know how this works for you. :)
Also, I'm digging "Capture the Marble" - I've been itching to try getting one of those swirly glass marbles in. Initially I was thinking of it as a hazard, but now I'm considering "Marble Soccer" or other uses... Stay tuned for further experiments over the next month!
