Hello! Sorry for the late response, let me clear up some of your questions:
Why no run button? We didn't think of that, honestly. Instead, I fixed the different speeds depending on the occasion. Good idea, though!
Sound was loud sometimes? So sorry about that, none of our playtesters reported the sound being too loud, so I didn't think of changing it. We'll test even more next time!
No sound on the menu? That's on me too, our main artist had the idea to add some, but I was already uploading the game at that moment. We'll try to do better next time!
And thank you so much for your comment, much appreciated. Hope you enjoyed the game :D