This is a billiards game in a 3D space. In addition to considering the plane angle when aiming, you must also consider the up and down space. The difficulty is higher.
There is a line of sight as an aid when aiming, and the collision angle can be measured based on a virtual sphere

The game is divided into continuous pass mode, free mode and special mode
The continuous pass mode needs to pass each level in sequence and the remaining shots will be retained to the next level.
In free mode, you can choose to play at any designated level, and the number of shots will be reset for each level
Special mode Each level has different scenes and some special obstacles

Free mode offers three levels of difficulty:
Simple difficulty: no order requirements, just score all
Normal difficulty: Red and blue balls are scored alternately
Difficulty and difficulty: balls of multiple colors are scored in the specified color order