The Lonely World power would only work with Void coupled with Mimicry or Illusion. We don't see Partitioning making sense for it. You should also emphasise how it imitates a pocket/parallel space rather than being a pocket/parallel space itself, as that falls under the "Space" Master-Legendary keyword. The Lonely World concept can be separate enough to exist without being seen and able to contain people and things, but not a genuine separate space.
The Heightened Strength keyword already has a defined frame, which overrules a player's self-defined descriptions for it, so keep that in mind. You can leave this blank on the power descriptions or use the definition provided.
Quote:Heightened Strength
You are able to lift a draft horse overhead with little effort.
The cantrip "Window to the Void" would more likely be something like void/illusion rather than void/partitioning. The "Contact from Beyond" cantrip will work with Teleport, as there's a modification coming to the Keyword in the next update that would make that interpretation work.
You've also listed your dice pools incorrectly. Make sure to use the "xD6" formatting where x is the number of dice in your pool.
Just tag us in #mod-request in Discord once you're finished! We're looking forward to seeing Yuto in play!