Thanks Victor! That's really helpful.
I've uploaded a new build that maps buttons 12-15 to the D-pad by default. So in theory, even if you reset the controls, you won't need to remap those :) Similarly, I've set the default mappings for Action A and Action B to your preference.
I've also mapped the symbols for the Start and Select buttons for both controllers.
I've left the others as numbers until you can confirm I've understood the mapping correctly.
And maybe you can supply the missing ones as well?
This is what I have based on your post:
PS4
Cross : 0
Circle : 1
Square : ?
Triangle : ?
Xbox
A : 0
B : 1
X : ?
Y : ?