The most reliable way to jump to any level is by using the Universal Master Password discovered by the community and documented on sites like shikadi.net. Select from the main menu.
Below is the verified list of passwords. I have tested these on the original DOS version (Titus 1993) and the modern emulated versions (DOSBox). Note: Level 1-1 has no password because you start there. prehistorik 2 level passwords
Once you beat the boss on Level 4-3, the game displays a password that says END or TITUS . Do not use these; they simply crash the game or show the credits. The most reliable way to jump to any