Commander Keen 5 Cheats and Secrets

Commander Keen is a series of side-scrolling platform video games developed primarily by id Software. The series consists of six main episodes, a "lost" episode, and a final game; all but the final game were originally released for MS-DOS in 1990 and 1991, while the 2001 Commander Keen was released for the Game Boy Color. The series follows the eponymous Commander Keen, the secret identity of the eight-year-old genius Billy Blaze, as he defends the Earth and the galaxy from alien threats with his homemade spaceship, rayguns, and pogo stick. The first three episodes were developed by Ideas from the Deep, the precursor to id, and published by Apogee Software as the shareware title Commander Keen in Invasion of the Vorticons; the "lost" episode 3.5 Commander Keen in Keen Dreams was developed by id and published as a retail title by Softdisk; episodes four and five were released by Apogee as the shareware Commander Keen in Goodbye, Galaxy; and the simultaneously developed episode six was published in retail by FormGen as Commander Keen in Aliens Ate My Babysitter. Ten years later, a homage and sequel to the series was developed by David A. Palmer Productions and published by Activision as Commander Keen. Another game was announced in 2019 as under development by ZeniMax Online Studios.
Cheat codes, console commands, secrets:

The cheat-modes are used by pressing the Function key and a normal key
at the same time. This is the FULL list of all the cheat codes (I hope)
Start the game with "K5 -NOWAIT"
~~~~ ~~~~~~~
F10+P This is used to pause the game.
F10+S To slow down the game. There are 2 speeds.
F10+E ends the current Level when you find that one to difficult.
F10+Y Shows all secret rooms in the field.
F10+W WARP-mode, go to a different level.
F10+T Gives information about the sprites of commander Keen.
F10+I Gives extra points, guns, GEMs and lives in a random order.
F10+D Play a demo of a level of your choice. NICE !
F10+G Activates the GOD-mode. You become Immortal.
F10+J This is the JUMP-mode. Jump to the sky with 1 jump.
F10+N NO CLIPPING, walk through walls and floors. THIS can be useful, but
sometimes causes your own death. With no clipping the floors will
fade away and maybe there can be lava under the floor !
F10+C Nice mode...It shows how many creatures you kill, and how many remain
F10+V This gives you 1 to 8 extra VBL's.
F10+B Changes the border colour.
Cheat codes, console commands, secrets and system requirements for Commander Keen 5 free online.

Game description

Game Developer:
id Software (Episodes 1–6) David A. Palmer Productions (2001 GBC game)
Game Publisher:
3D Realms (formerly Apogee Software) (Episodes 1-5)