This, ladies and gentlemen, is good work!
"Fragile Shells" is an excellently made text escape game. It consists of a series of interconnected puzzles, all of them solvable by using logic, common sense and a ready knowledge of basic physics.
Maybe too easy for some, but I found that the layering of one puzzle onto another, linking their solutions together into one clear chain from the givens to the conclusion was very satisfying indeed.
Just about every command I tried had a meaningful response, a very friendly game indeed.
Add to this an exciting backstory remembered in bits and pieces by the protagonist to frame it, and you get a short and delightful IF-gem.