The Parrot Game Sample is a collaboration between Secret Dimension and Epic Games, created to support developers who are looking to switch to Unreal Engine to gain a deeper understanding of the engine and the broader Epic Games ecosystem.
Parrot is a pirate-themed 2.5D platformer with three levels, a title screen, rebindable controls and a full menu system, available for free as Unity and Unreal Engine versions, with complete documentation and fully annotated Blueprint and C++ code.
It’s not clear to me exactly where you’re having trouble, but if you’re looking to create a standalone build, the project as delivered should build and package the game with the default Windows build settings.
If it’s running in the editor that’s hanging you up, open the _Init scene at /Assets/Scenes/Application/_Init.unity, which should allow you to run the entire game from the Main Menu in the editor. You can also play directly in a level by opening one of the environment root scenes at /Assets/Scenes/Environment/Level1Environment.unity (Or Level2Environment.unity, LevelBossEnvironment.unity, etc).
If there’s something else going on, let me know more details and I’ll see how I can help!