In my opinion, g-a-i (or rather app-install-data) should use the same algorithm used to determine the appropriate icon in the desktop files when deciding which icon to include. This may represent a bug in the app-install-data-ubuntu, but nothing needs be changed in neverball to support this.
Note that the neverball package actually installs two games: neverball and neverputt (with two separate .desktop files). I'm not sure which is appropriate for use by app-install-data, nor by which algorithm a determination should be made.
In my opinion, g-a-i (or rather app-install-data) should use the same algorithm used to determine the appropriate icon in the desktop files when deciding which icon to include. This may represent a bug in the app-install- data-ubuntu, but nothing needs be changed in neverball to support this.
Note that the neverball package actually installs two games: neverball and neverputt (with two separate .desktop files). I'm not sure which is appropriate for use by app-install-data, nor by which algorithm a determination should be made.