Grandma Bethlinda's Variety Box

This minimalist parser game feels like it learned a lot from the success of Twine games, and responded by making a stripped-down straightforward puzzle box. I really liked it.

The box has different moving parts you have to interact with (using the single command U for USE or UNDERTAKE TO INTERACT WITH, according to the author). As you do, more and more pieces show up. You are taught how to use some pieces that you have to remember later; other puzzles require leaps of intuition or timing. I finished without hints, which is very unusual for me.