You replace the file game/tl/en_US/chapter1A.rpy with the file from https://github.com/nguyenquocthao/mixes/blob/master/charpter1A.rpy
You replace the file game/tl/en_US/chapter1A.rpy with the file from https://github.com/nguyenquocthao/mixes/blob/master/charpter1A.rpy