Commander Keen Episode Two Secrets

Commander Keen Two is also a very basic game.

If you hold down the keys C, T, and SPACE BAR, then you will get lots of ray gun charges, a pogo, and all of the keycards.
If you down the keys G, O, and D, then will become invincible and be able to fly with your pogo. You will also be able to walk through walls on the map level.
On the map level, hold down the keys SHIFT and TAB to walk through a level.
It's just pitiful that I can't remember where this level is. . . Never liked Keen2 much anyway. In one level ( it starts out with a whole bunch of holes to hop over, followed by a red maze-ish thing with keycards ) there is red maze-ish area. After that is an area with blocks. Jump on the bottom left one and perform some trick I can only pull off when I'm not trying to. It involves using a pogo where you can hit your head on the same block twice in one jump. Perform this and a Vorticon Elder Message will pop up.
The levels with tantalus rays have names, based on the name of the city you save in the level. The Vorticons mixed up Rome and Moscow. Cho'gall found this secret.
To the right of the mothership ( on the map level ) is a message written in SGA. If you have a translation, you will discover it says " Blue prints, Acme." I don't think I need to explain what Acme is.

That's all I know. If you know of another one, e-mail me.