Hydroxian did something very excellent.

To skip a lot of unnecessary explanation, Synthwave City Zone is a place between realms that Alder (evil Juniper) created to bridge the gap between the good timeline (good Juniper) to his own.

Juniper doesn't want to be a villain so he's sending a message to his evil self after stealing back the Phantom Ruby that started it all. Imagine the F-Zero anime ending or something to this.