Plain physics is key here and it feels good when it works. The main mechanic is drawing one line to guide the juice into the glass.
Click and drag to draw a path for the juice, you must avoid obstacles to fill the glass.
Controls are clicking and dragging to draw a line. The game has drawing as a feature to guide the juice.
Most important is to plan your line before you draw it. You must avoid obstacles and make the juice flow correctly.
Q: What are the controls? A: Click and drag to draw a line.
Q: What is the objective? A: Fill the glass to the top with juice.
Q: Are there any stated features? A: Drawing is the main feature stated.
Q: What is the main mechanic? A: Drawing a single line to guide the juice.