If your menus are still silent and you'd rather spend jam hours on the horror, these two packs are free:

• Essential UI SFX: 150 interface sounds, 30 events with 5 versions each, so clicks and confirms don't repeat.
  https://willosuna.itch.io/essential-ui-sfx
• Magic Spells SFX Lite: 30 spell sounds (fire, ice, lightning, shadow, holy, poison, shields, portals, summons).
  https://willosuna.itch.io/magic-spells-sfx-lite

Mono WAV, plus OGG versions for lighter web builds.

All of it is synthesized from code: no recordings, no third-party samples. Royalty free for commercial use, no credit required.

Good luck with the jam!