1.- to remove the "Select Install Language" windows, you have to add the folowing line to the [Setup] group:
ShowLanguageDialog=no
Although, remove the group [Languages] and anything inside - English will become the default language.
2.- to create an icon for the game in the Desktop add this code (and change the necessary parts) to your script:
Code:
[Icon]
Name: "Rise of the Aragonauts (ENG only)"; Filename: "{app}\Binaries\RiseOfTheArgonauts.exe"; WorkingDir: "{app}";
Check the Inno Setup help for more options but with only this ones will work.