Replicating the Classic game 'Pong' using variables.

It's an app designed to give Landlords of residential properties the tools they need to let and manage their own properties without the need for an agent. I'm struggling a bit with the UX and creating a professional looking design. Any advice would be appreciated! (It's unfinished by the way)

A Picker selection navigates you to the screen selected. The project uses Variables and States and depending on the picker selection I change a button state to navigate you to the right screen.

A very basic Calendar example project using Containers a few states and 1 variable to track the year.