Lyra uses a two layer menu that looks for Lyra User Facing Experience Definitions in the search paths and adds it automatically to the first layer menu
We slim that down to a single step approach - but still use the components to integrate into Lyra if that is your goal later
We use a lot of grafical component from Lyra - here you definitely want to modify them to your own style
The option menu from Lyra is extensive - so be glad to not having to rebuild this!
Steps (referring to infographic letters)
L-Q: Build a new level that acts as entry level and only shows the startup screen and menu