Glad the physics engine humored you! I also really wish I had saved time to make a tutorial or changed up how the health system works. Basically, the four sparkles orbiting your sword are your health. They fizzle out over time, and you must re-enter the shrine to regenerate. It's not conveyed well at all so I apologize. As for mobile, it technically already works! I tried it on my phone today and its almost entirely playable.