Guy looks kinda like he’s wearing a jacket with a gap at the waist. That would totally not work. You can’t have a gap that lets air out. The Apollo suits were one piece designs; two piece with a hard shell locking waist ring came later.
We’re talking nowadays about compression suits that are only inflated around the head and maybe some upper body. Those would help a lot with mobility, but nothing like that has been deployed yet.
Unlike many video game adaptations, Douglas Adams was substantially involved in the game design and writing the text. I believe he shares the authorship credit with an Infocom programmer.