There's a Big Problem in My Heavens!

Xie Saki was forced to travel through multiple worlds to complete set tasks. The system assigned to him has major problems and hidden dangers, which can both help him and harm him. Overall, I'm still helping him, but I'm a bit troublesome. Shoot guns and practice dynamic light waves in a fantasy world. In a fantasy world, sign in to technology and develop the economy. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.