The subtitle of Flowers of Mysteria is "an old-fashioned text adventure," and that is very much the truth. For example, the title page features ASCII graphics, and after each command you are asked "What now?" followed by the prompt. It was also written with what looks like a homebrew parser.
The plot is that you are tasked with finding four mystical flowers in order to brew a remedy for the ill king. Finding the flowers isn't too hard; the puzzles are mostly straightforward and logical, in keeping with the game's old-fashioned text adventure sensibility. I did go to the walkthrough for help once, but that was the only place where I was stuck for a while. (And the solution made sense once I knew what it was.)
One solid design choice in particular helps Flowers of Mysteria avoid some of the problems often found in older text games: It tells you exactly which verbs are understood, so there are no guess-the-verb issues. (I went back to this list several times - it was quite helpful.)
If you like old-fashioned text adventures, I'd recommend this.