When asked to buy more energy, say yes. The goal of this is to talk to pou, pou will respond to every correct or incorrect prompt that you type. sometimes the answer isn't clear, so pou will do a (yes / no) prompt or something similar. remember if pou gets to sad or unenergized you will have to start over, you an reenergize pou by giving an IOU. However if pou gets to sad your game will end, this can be counter acted by answering questions correctly to make pou happier through out your playthrough.
I stole most of this Pou design from some scratch person