Going through a break up sucks. Like really sucks. There's no getting around it that I've found. It does get better after some time (maybe a lot of time), but I wouldn't worry about that right now. Exercise seemed to help me with some of the overthinking and rumination. Over time it will get less raw and you'll likely develop some perspective that will help, But for now take time to grieve and feel sad.

I remember having a blast with Rocket Jockey - I think we had it on a demo disc? Otherwise I always loved Sim Copter.

Was it first person screens or a side scroller? The puzzle part sounds like it might be Journeyman Project.