I'm so glad I found this thread hahah! I actually used synths for making almost all the SFX for my game, but what I'm most proud of is how I made my spinning sound by taking a flat windy noise, and scale it up and down in pitch depending on how many degrees you have rotated (in an abs(sin(x)) curve)! As a result, the SFX for faster spinning "loops" faster than for slow spinning, and will always be synced to what's happening on screen!
Here's the game: https://itch.io/jam/theveryseriousjuniperdevgamejam/rate/4713638