I'm a product design student. I'm not familiar with the terminal or writing code. Please build this for me with HTML, CSS, JavaScript and native Web Audio. Make a simple, usable browser page, with no external libraries or internet services. Sound should start only after I click. Use comfortable initial levels. I need to play with the result, not read code. Make another interface for the same soundscape engine. This should feel like a simple listening object: choose City, Forest or Water, then use one large intensity control and one movement control. Keep space and the musical layer close by. Put detailed source levels, event rules, import, scenes and timer in an expandable panel so all capabilities remain reachable. The main screen should support listening with few distractions. Preserve the previous app and use the same engine.