Fun little change

I said I was done this project but I had a simple idea to implement to make the game more fun :

Instead of spawning pipes at a fixed interval and distance, each new pipe now appears after a random delay between 0.5 and 2.0 seconds. The vertical position of each pipe also shifts based on that interval, shorter intervals result in smaller height changes, while longer intervals allow for larger movement.
This makes the pacing and terrain flow feel more organic and dynamic during runs.

Also fixed a bug with mouse support