This PR removes debug features, cleans up dependencies, and makes minor code adjustments. The main changes include disabling debug visualization, removing unused dependencies from pyproject.toml, and cleaning up debug-related code. This PR adds background music to the start screen and includes some code clean-up. The implementation adds a new sound channel and sound file for the start screen music, which plays in a loop until a key is pressed to start the game. Several setter methods were also removed to improve encapsulation.