This is a RPG Maker VX Ace game created by me!
A girl with enigmatic powers sets out to destroy the world after a comet passes by her village. Her adopted sibling attempts to stop her but only finds defeat by her hands. The girl warns that there is only one way to defeat her and she whispers two words: Infinity Splice. Reincarnated, the hero must travel between dimensions to figure out what this mysterious device is and how to find it.