I don't believe you have a problem. There is a very minimal amount of "play" in the keys and the switch mechanisms beneath them. It's all to do with designed-in clearances and operating tolerances. I can get just about every key on my own keyboards (many) to make some sort of noise.
However, if you're concerned that the noise is excessive and want to have someone evaluate it for you,
you can make a Genius Bar appointment for hardware/software service and support using this link:
Contact Apple for support and service - Apple Support
Get your Mac repaired and see how much will it cost:
Mac Repair & Service - Apple Support
Call Customer Support (800) MY–APPLE (800–692–7753)
or on line https://getsupport.apple.com/
or call AppleCare Support at 1-800-APLCARE (800-275-2273)