Quick answer
Open the official Roblox game, read the current stage and inventory screens, inspect the enemy path before placing, then use your first run to learn coverage and upgrade timing. There are no verified codes or mandatory starter lineup to copy.
Chrono Warfare TD is still described as unfinished and in development. This guide therefore treats the live client as the final authority for menus, stage availability and changing balance. It does not infer wave counts, tower costs, damage, enemy health, drop rates or rewards from incomplete footage.