Update: Mobile Controls and Audio Slider Optimization

Implemented mobile touch controls with on-screen buttons for smooth movement on Android devices.

The mobile control buttons now automatically hide on PC to keep the interface clean and uncluttered.

Redesigned UI buttons for better layout and visual consistency — all buttons are neatly arranged on a single image for easy navigation.

Improved audio settings: volume sliders now offer better control with adjustable minimum and maximum levels, making the audio feel more balanced and natural.

Upon game start, the volume sliders sync with the current audio mixer values for seamless user experience.