I didn't think too much about the phonology. I'd say your interpretation was reasonably close to what I had in mind, except I imagined <q> as /kw/ (can't do the superscript here but labialized k) because english. i'd like to incorporate more phonology if I redid this concept, i was just worried in a 48hr jam it'd be hard to tune the difficulty of it so i just went the easy route and didn't implement e.g. sound changes.
if you're interested i actually put together a short inventory of themengi's lexicon and (very minimal) grammar, which i could send you if you want. it's like 20 words just about, most of them used in some way or another in the game. it's very far from a full conlang -- i've never made a conlang before and dont really know much about them beyond poking at sindarin a bit. i am a ling student, which helped, but i definitely want to learn more about conlanging if i was to redo this.