There is a black screen simply because your main script does nothing after the solarus logo. You never start a game so nothing happens. See chapter 2 about running your first map.
Also, in the quest properties, the write directory should be a simple name, never a path. For example, loz_darkest_of_hours.
Here is how it works: all games using solarus, and not only yours, store their savegames in a subdirectory of $HOME/.solarus, where $HOME is the home directory of the user (like C:\Users\test1 in your case). This write directory thing is the name of the subdirectory your game wants to use. If you set it to loz_darkest_of_hours, savegames of your game will be stored in C:\Users\test1\.solarus\loz_darkest_of_hours. The only goal of the write directory is to avoid conflicts between different Solarus games installed on the same computer.
The crash was probably because you had backslashes in your write directory. We will fix that.
I hope it helps!
