"To finish the level" means completing all the tasks or challenges necessary to progress to the next stage or part of a video game or any other task-oriented activity. Full definition
It's a great system that makes for satisfying play, and skillful players will be able to finish levels with impressive grades. (consoleob.com)
You know how you have to pay more money after finishing a level in certain games? (pixelatedgamer.com)
There is something delightful about the sense of accomplishment you get after finally being able to finish a level on hardcore platform games. (switchplayer.net)