Keen 1 Easter eggs
This is a list of easter eggs (intentionally hidden messages and functions) in Keen 1.
In some levels, words can be found written in the Standard Galactic Alphabet using candy as blocks to form the letters. For example, the word "HI" can be found at the entrance of the Emerald City level, formed with lollipops.
The word "ID" (as in id Software, the creators of the game) can be found in two levels: on the first one, Border Town, written in blue letters on top of some columns at the start of the level; and in the last level, the Vorticon Commander's Castle, written with Soda cans on the top left corner of the level. Both are written with latin letters, not the Standard Galactic Alphabet.
It seems that the Soda can is a reference to the Pepsi soda (see its article for more details).