Thank you for really inspiring me. The unlocking of the last ten levels is difficult. I don’t know if you were lucky enough to get a good result in the tenth level or you tried for a long time, but it was totally beyond my expectation anyway. Level 20 may require some tricks. When in the ocean current acceleration zone, switching to slow speed can maximize the time for ocean current acceleration.I didn't do enough in the tutorial. Sorry for any confusion.Maybe next time I'll try to find some teammates.