Plain physics is the core mechanic in Delete Story Dop Brain Puzzle, and it makes you think fast. The puzzles can be frustrating when physics messes with your moves.
You tap or drag to solve puzzles, which makes you think fast and act even faster.
The controls are click and drag, and tapping works most of the time. The puzzles make you think fast and act even faster.
Most of the time you should focus on the puzzles that test your reasoning. It is better to be fast then to be slow.
Q: What are the controls? A: Click and drag, or tap.
Q1: What is the objective? A: Solve puzzles.
Q2: Is there a timer? A: Not stated.
Q3: What is the main mechanic? A: Physics.