This was a nice way to handle it, but I feel like an opportunity was missed by having each universe actually run in parallel. I didn't really appreciate having to type in the universe names myself (being able to use the arrow keys or something like that would've been cool) or how you were forced to buy every upgrade before splitting, but I really liked the way the timelines split and you did a good job making each universe feel distinct, mechanically. Also, I knew where that link was going, excellent choice.