I think your game has potential but, at present, the questions are too hard and the answers are sometimes simply wrong. Example:

Q: Find the noun matching the following definition: "A burden or responsibility."

A: Saddle

This is not correct. Saddle as a verb can mean "to burden", but as a noun it does not mean a burden.

As someone who works in the linguistics space and has worked with numerous teams on games and has a wealth of knowledge on how people actually learn vocabulary and what they actually find fun when doing so, I feel like this game would benefit from a pause, a rethink, and a redo. I am in the middle of a Covid bout right now or I would say something more substantive but perhaps most important: you already have valuable feedback here you seem to be rejecting. Why? For example, what if you did allow multiple answers in the blank and scored accordingly?

By its nature, this game should accept synonyms of the synonyms it is looking for. I offered “bountiful” when the game wanted “abundant.” My answer was not wrong. When it was rejected I instantly lost interest (i.e. motivation, will, desire) to play the game.

> Guess the missing word to complete the following sentence:

> Everyone respects him, he's the _ _ _ _ _ in this business.

Apparently the answer is "daddy"... this is not a good question or answer. Good luck with the launch, but you might want a native speaker to audit your question bank.

Why do you make people pay yet you claim to be helpful...you know helping is not always about getting a reward in return right?

Hmm, weird questions

"Question: Find the word matching the following definition: Extremely or very much."

My Attempt: "sufficient"

Actual answer: "jolly"

huh??