Could any uxntal-savvy folks help me make sense of this?

`.Controller/key DEI ( read key ) DUP LIT "1 EQU ( is the key '1'? ) ,&color-1 JCN ( jump to color-1 if that's the case )`

If I press 1, the stack looks like this: `31 01 2F`. I assume 2F was pushed down there by `EQU`? Is that right? Why is it 2F and not 01 for example?

If I press another key (for ex A), the stack looks like this: `61 00 0D`. What is this 0D there?

(I'm using the uxnemu debugger to get these values)