It's a very challenging game, and you can play every level by drawing lines This is a great brain training opportunity, every level has a story, and the main character in the story is you How to play? 1. Clear the customs clearance requirements of each level 2. Offer solutions by drawing lines. You can only draw one line 3. You need to use physics in your life Game features 1. Entertaining and time-killing. 2. Funny physics system. 3. Exercise your brain. 4.Test both your IQ & creativity. 5.En