I noticed some portions were marked for later completion, so I'll only review what was made.
Your game's premise intrigues me. It makes me think of a mix of Homeward Bound (the movie), Stray, and Untitled Goose Game. Where the Winnie and Mags are going on a long adventure together to get back their owner's artifact from the Raccoon.
The idea of the Stress and Motivation management is interesting in how it might play into both pets' reactions to things in the game world. Having each of them be "NPCs" while controlling the other also opens up opportunities for intriguing level design with how each animal would interact with and disrupt the map accordingly.
The detail you gave into each pet's story and the summaries of your level zones also helped paint a clear mental picture of what this game could become. You did well and I hope this project can go a long way for you!