Time indeed flies in the game and sometimes it can been stressful to try to be as quick as possible so can there be an option to make the game last longer? It will also reduce the number of times we have to start from zero all over again.

It's not real time, each term lasts a certain number of cards (or card sequences to be precise), so longer games would mean more event. DSS is meant to be played in one session and to be replayed only a couple of times.