Bad Snack Edit
Sound design in games is important. If you have music in your game, make sure that each track of music plays at appropriate times. It's important that each music track fade into and out of each other at appropriate times and not too often, or else it can be incredibly jarring. If you want context-sensitive music, it's better to have sound channels that layer on top of each other instead of switching tracks completely.
Example: Xenoblade Chronicles X Edit
In this game, you get a mech roughly halfway through the game that lets you traverse the landscape faster and easier. Mountains that you could climb before can easily be jumped over with the mech. However, later in the game, the mech is upgraded to enable flight. While it helps for traversal, enabling flight mode has a completely different music track. Getting the flight module also disables jumping in the mech completely, so whenever you want to scale terrain, you must fly and must change the music track.
See the end of this video for an example: