I am thrilled and humbled that TimeShift is a stepping stone for your inspiration.
I love the concept. Ending credits are, after all, what many of us aim towards. You may, though, want to add a proviso about non-linear games such as simulators and strategy games where the credits are often found by selecting them on the title screen... they may or may not have their own theme that plays.
Given the complexity of this, I wouldn't recommend necessarily enforcing a 12-month limit for this one. It took about three months before I had sufficient sketches of ideas for TimeShift, a few months later I had a couple of WIP's to send off to make the project official, and then as the deadline approached in September there was a last-minute rush of new material. And even then I had to wait for things to be finalized. I'm not saying "don't do it" but be mindful that the short timeframe will impose its own set of challenges.
I'm definitely interested in this album idea, though, and I'm already thinking about ideas...