If I had to explain it in 30 seconds or less, here would be my elevator pitch.
At the most basic level, the user interface (UI) is the series of screens, pages, and visual elements—like buttons and icons—that you use to interact with a device.
User experience (UX), on the other hand, is the internal experience that a person has as they interact with every aspect of a company’s products and services.
https://www.usertesting.com/blog/2016/04/27/ui-vs-ux/
The global market has become very competitive and extensively influenced by numerous technical, commercial, and aesthetic factors. Every business activity, digital processes, and marketing strategies from the creation of a website to the online purchase of a product has become granularly sophisticated as well as powered by the use of modern technologies.
https://www.technotification.com/2019/01/difference-between-ui-and-ux.html/
The education game market continues to grow rapidly, and mobile learning games are a dominant force in this market. Newzoo, an industry analyst that provides insight for the generic games market, predicts the overall mobile game market across all game types will grow 40 percent between now and 2020. That’s a significant growth increase.
https://www.td.org/insights/when-games-go-small/
The calculator isn’t the most beautiful thing in the world but when you press your fingers into its buttons, it can do some wondrous things. Or take Crocs — the butt of many jokes — but the first choice of shoes for people working in the medical profession. That’s the thing when it comes to the user experience vs. usability debate: products don’t have to be beautiful to offer a great user experience.
https://uxplanet.org/when-good-design-goes-bad-examples-of-ugly-ui-with-great-ux-48d72c7d1601/