The person makes a key to open up a locked SACK.
artworks. ★★★☆☆ 作 (make) + 品 (products) = 作品 (artworks.)
author ★★★☆☆ 作 (make) + 家 (home) = 作家: (author)
handmade ★★☆☆☆ NEO 手 (hand) + 作 (make) = 手作り (handmade)
strategy ★★☆☆☆ 作 (make) + 戦 (fight) = 作戦 (strategy)
any strategy for succeeding - in war, business, school, etc.