If you need additional flexibility for gathering the inputs for your Dynamo graph, you can install and use the Data-Shapes Package (from the Package Manager) to define inputs in a custom user interface dialog.
The Data-Shapes nodes allow you to create a multi-input dialog that will appear when you run your Dynamo script using Dynamo Player.
Check out this posting from the Data-Shapes development team that explains how to use the Data-Shapes nodes: