Nah I 100% agree with them. It's refreshing to read your writing; as you said, the vocabulary and flow make it something truly unique and engaging, much different from any other VNs I've played. You do use words a lot of people probably wouldn't know, but you give more than enough context for a general audience to infer what the words mean, and it's clear you're not just shoving them in there to sound pretentious.
TL;DR (though I know you will <3): You're spot on with your goal — just the right amount of fun and quirky! Your growing fanbase will attest ^^