That slideshow of all the different situations is incredible. Especially the star field.
Don't leave the sound design to the very end though! A good soundtrack can elevate a good game to an awesome game, or a mediocre game to a good game. One game that might inspire you is Radar Mission for the original Game Boy. It's a basic battleship game, but the soundtrack is incredible, and I would often play it on autopilot at the end of a rough day to unwind. (It was available on the 3DS eShop as a Virtual Console title, but since the eShop is shut down now the only way to get it on the 3DS is by installing custom firmware that allows you to sideload stuff).
Here is the original soundtrack to Radar Mission on YouTube: https://youtube.com/playlist?list=PLd_GcSlmM7zaLV3oxkUjZ9rJdYsdt8EU8