I got feedback from the first I show how my app works on watch:
So I make some changes of it through last week:
1. Remove the app icon in each page. Only show it in the first page
2. Clearly two functions on this app, which are to control the playlist based on four different modes and then you can share the songs you like in other activities.
3. Since the platform is Apple watch, I found some resources about apple watch http://time.com/3813524/apple-watch-why-buy/ I really recommend and The Invisible Design Behind the Apple Watch’s Many Faces http://www.wired.com/2015/04/apple-watch-design/. Based on these researches I enriched the specific function of watch using in my app.
Using “pressure” function and rotate digital crown to choosing multiple options lay out in one page on the watch.