I'm very happy to recommend a novel that focuses on fast transmigration, and that's "Summoning Eldest Senior Brother at the Opening"! The main character, Wen Feng, traveled to various worlds, looking for clues to solve the puzzle. The system he was bound to forced him to summon a god to help him complete the mission. Not only did this novel have elements of time travel, but it also had some suspense and mysterious plots. Especially when exploring each world, there would be many interesting things to encounter. Moreover, this novel was a light prank, so it wouldn't torture the main character too much. I hope you like this fairy's recommendation. Muah ~😗