Would this solve a problem?
Uhmmm. Looking at your game's interface, I can picture myself playing with both hands and the cellphone on my lap - lots of icons everywhere on the screen. I don't think swapping everything would really make a difference...
Have you handed the game to beta-testers and watched them play it? It might give you some insight.
Not even sure it would've mattered... gamers are so conditioned to move from left to right, might've just confused lefties.
It's not just a gamey thing, even comics and movies follow this rule: our brain is accustomed to link left-to-right movement with going forward, while people moving right-to-left appear slower to us. It's because we write left-to-right!
So yeah, it was a nice effort, but I think an endless runner with the character going left would utterly confuse players. Swapping icons of power-ups and such would still be nice, through.
A good example is
: characters runs toward the right edge on the screen, while you play match-3 with icons flowing underneath. The leftie mode simply changes the way the icons flow - they go right from left, so I can easily press them with my left thumb. It works very nicely.
I worked on a DS game once that was fully controlled with touch, not only that but the player was supposed to hold the DS sideways, like in Rhythm Heaven, Brain Age and Hotel Dusk. Halfway through development we realized that this wasn't good for lefty players and so we had to add a left-handed mode to the game and redo all the screens in that mode, reprogramming the position of all the assets. In the end it worked fine.
That was so considerate of you, many thanks! Hotel Dusk was such a confy game, I really like the concept of holding your DS sideways like a book.
How was your game called?