This game is an absolute blast and pretty addicting though I kinda have a personal issue with the controls (especially if it's actually targeted for theee fingers players) but I just can't say no to blasting zombies!
I'm personally fine with both! if it is meant for three fingers than as the other comment have pointed out, the control between moving and shooting might need to be spaced out a bit more. though I suppose two buttons could've made for a secondary controls option.