Plain physics in Marblet is the main thing. i find the game loop is addictive in a weird way.
Step moving the marble relies on simple controls, usually just tilting or clicking.
Controls are tilting or clicking. Mastering how much to tilt takes a lot of trial and error.
Most slow controlled movements help more than quick flicks. Try bouncing back and trying a different approach.
Q: What are the controls? A: Tilting or clicking. Q1: What is the objective? A: Collect diamonds. Q2: What stated feature exists? A: Not stated. Q3: What is the main mechanic? A: Moving a marble.