sorry for the misunderstand, i first tried with my keyboard and it didn't worked, so i tried with a virtual one after and had the same issue. i just tried again on a new save and now the button is a "+", wich is not detected again but i didn't know i can click over the text to open the chest and it finaly worked ! it seems so obvious now that i feel dumb for not tried it before. i just finished the demo and had a very good moment, i will definitly follow this project !