Scratch Games Online has a lot of different gameplay and tasks, which keeps the game interesting for players.
 

Gameplay:
Different types of games: Every game on Scratch Games has its own controls and way of playing, ranging from adventure to shooting games to puzzles.
Simple and easy to use controls: Since the games are made with Scratch, an easy-to-use drag-and-drop program, the controls are usually simple and easy for people of all ages to use.
Changes that are easy to make: Some games require quick reflexes, while others are more about strategic thought or fun.

Objectives:
Different goals: Each game has its own goal, like collecting points, working puzzles, getting past obstacles, or finishing a story.
Making things harder: Some games have a level system that makes tasks harder as you go through them.
Creative Element: Because community-made games are often made with unique tasks that don't follow the rules of regular games. 

When playing scratch games online, the gameplay is usually very direct, and the tasks keep people wanting to keep exploring and beating challenges.