Buy HERE: 
https://unrealengine.com/marketplace/en-US/product/game-ui-sound-pack
https://www.asoundeffect.com/sound-library/game-ui-sound-pack/

In my humble opinion, this is the most powerful and essential library that every Game Devs must have in their tool box. As a sound designer who worked closely for years with Game Devs, i've realized that when it comes to attach a sound to a character, you need to find the best choice very fast, because searching for a perfect sound effect, sometimes can be a very tedious and time consuming task.
Take a Game UI Sound Pack for a ride, you'll enjoy how fast and easy will be to find the perfect sound for your game! 
182 sound effects
10,38 minutes of game audio	
125,5 MB of audio samples
40 Game Level – Arcade style game complete, Objective Complete, Open World Mission Compete, Map notifications & more
62 Highlight – title screen logo, fun pick up, synth wobble, collect tool, melodic stingers
72 Menu UI – bubble Buttons, coin pickups, liquid transitions & more
8 Musical loops
All royalty-free!

Game UI Sound Pack

"Unleash the Power of Sound! Elevate Your Project with Unrealsfx's Professional Sound Design and Mixing Services. Experience Premium Quality and Competitive Rates. Contact us today at studio@unrealsfx.com."