Learn to separate a casino game’s theme, format, and features before you play....

https://direct-wiki.win/index.php/What_Is_Slingo_and_How_Is_It_Different_from_Bingo%3F

Learn to separate a casino game’s theme, format, and features before you play. The theme sets the story, the format explains how wins work, and features add special mechanics. For example, cascading reels describe a feature, not a theme or format