In taking all of what I'd learned, I found I could make a really meaningful environment, and something I could tell a story with. His old, boring jobs could be the starting point - an uphill struggle to conquer, split into sections and offering their own challenges. Once done, the player is rewarded with Dad's dream garage complete with his most valued possessions as well as those he wishes he had - his Dad's Triumph Tiger 80, for example. Dad's bike and a landscape to be free to explore, the same way he used it when he had to get away in real life.
In environment the player gets to explore is Dad's dream tour of the UK - from Land's End to John O'Groat's. In this game he will be able to do all of this as a reward for persevering through all the tough times.