I really love Enzo, this little fellow is so cute and how he chases the mouse with physics is so fun! The world is beautiful handcrafted and the assets are wel done. However, I think the environment could be improved as sometimes the world feels so shallow and empty. Consider adding motion to foliage e.g by swaying in the wind and using Parallax Backgrounds to create more depth and by adding lighting (especially in the cave level) to your game.
The Music and SFX are good and fit this style of game perfectly, but get a bit repetitive and boring after some time. Adding different music tracks for each level and making few more sounds for Enzo and it would be perfect. Sometimes the controls for Enzo feel a bit sluggish, partly also due to the level design. There were a few areas where it was really hard, though overall the difficulty was good.
Overall beautiful game, i'm so glad Enzo made it (safely) back home!