Really fun game! I really liked the evolution system and how your choices actually affect how the pet develops. The different forms were probably my favorite part, and the art style gives the game a lot of personality.
My only criticism is that the tutorial could be a bit clearer. It took me a while to understand exactly how the different actions affected the pet, and I think the game could be even more enjoyable with a little more guidance. I also think having more evolution combinations would add a lot of replayability.
Overall, really creative concept and a very charming game. Great job!