Thanks so much for playing and for your feedback! Really happy you enjoyed the scenery, the SFX and the cat transformation!
I actually worked out the cat's walking and running speeds on the basis of real cats. The idea is that you run when you want to get from point A to point B quickly and you walk when you want to take your time and explore and discover the various Easter eggs.
There's actually a spot in the ninja village where you can heal yourself as many times as you like! After you've passed the torii gate, turn right and go up the steps. There's a little pavilion there where you can heal.
I really like your suggestion around making the buildings explorable and I'll certainly look at adding in the interiors in future updates!
And I totally agree with you on the sword animations. They still seem a bit unnatural so I'm going to go and improve them by looking at games such as Elden Ring.
Thanks again for the very detailed feedback, that's massively helpful in terms of improving the game.