adds game over credits (#74)

## Changes
- Adds game over credits

Reviewed-on: gymkhana/gymkhana#74
Reviewed-by: Eneko Nieto <eneko@eneko.ovh>
Co-authored-by: oier <oierbravo@gmail.com>
Co-committed-by: oier <oierbravo@gmail.com>

project.godot

@@ -846,7 +846,7 @@ _global_script_class_icons={
 "ESCItemComponentInventoryChecker": "",
 "ESCItemComponentOutline": "",
 "ESCItemCountManager": "",
-"ESCItemWithTooltip": "res://addons/escoria-core/design/esc_item.svg",
+"ESCItemWithTooltip": "",
 "ESCLocation": "res://addons/escoria-core/design/esc_location.svg",
 "ESCMain": "",
 "ESCMigration": "",