Interesting concept, do you plan on continuing working on it after the jam? Have you heard of Into the Breach? Has a story about traveling back in time to prevent giant bugs from overruning the world. Feedback wise I think when it comes to 3D platformers it's smart to have an artificial shadow directly under the player character so we know where we are located for precision jumps.
GameDev.tv Game Jam 2024 - Free Course For All Submissions! » Entries » Timeporter - RoBug Invasion (Jam Edition)