Oh that's interesting. Felt a little finnicky at first as I had trouble selecting the right planet when I wanted to. It might've felt better if after making a "connection" you would have to reselect your "first" planet a gain. Made a lot of accidental chains from night right clicking and left clicking in the correct sequence. Once I got it sorted out though I could really see the fun.
In my mind I almost wonder if this framing would actually suit like a trade-route/money making sort of game. Like trying to balance different resources like money and stuff. Galaxy wide economy simulator sounds fun haha. I'd be curious to see what a more flesh out version of this concept looks like!