Hi Adam, well done on your gamble free time.
I would have a “I don’t play them any more” or “I don’t know the new machine” line ready for the next time you are asked.
Especially with the short time left till your parents moving back there is no point risking any additional triggers.
Them moving back, and you trying to keep things secret, can inn itself be a trigger. if they are going to find out anyway then better to come clean. This time you can show them this site, tell them the positive actions that you are taking to tackle the addiction.
Keep posting.