I liked the puzzle involving using the envelopes to get the protagonist's badge to his office. Invisibility can be both a boon and a bane, it appears, and I liked the fact that the puzzles originate organically from this premise.
That said, some of the implementation could have been better. The ability to end the game by taking the sun was cute, or it would have been if the sun had been mentioned in the description of my location at the time, or if it were not something that could be automatically triggered with "get all". But that sort of response sets a certain tone, and I should expect a little more cartoony silliness in such a game. This game is cartoony, but in a different way. It's a cartoon where Wile E. Coyote has fleas and acne. Possibly fleas *with* acne.
In other words, the protagonist is an unpleasant character, and not in a fun way. Paranoia may be amusing, but details like personal hygiene are not. Unpleasantness in a protagonist character is more interesting when it comes out as a world view; less so when it is a personal characteristic that is only noted by other characters. Perhaps if the protagonist had some sort of belief in the so-called "natural state" and was fundamentally opposed to what normal people consider good personal hygiene....
There is a toilet in the middle of the protagonist's living room. It serves no purpose except to illustrate how disgusting the protagonist is. Needless to say, he is not a fun character.
As a breakfast, this would be leftover pizza from last night, and orange soda.