I admire you for creating something very different in RPG Maker, and that aims to help students! I also think it's great that you made it very customizable, so people can add in their own questions (though I didn't try that myself). I also liked the animations in the game, the background changes in different rounds, the devil and other pieces moving between rounds, and being able to choose different ways of rolling the dice. The angel's quotations were a nice touch too!
Aside from the fact that there were some grammatical errors (which I understand because English is not your first language), I'd suggest quickening the pace so that the game moves more quickly between questions. For example, when rolling the dice, there's a little pause between the text "How hard will you roll the dice?" and the choices coming up. I think the pause could be eliminated. And perhaps show the description of each type of tile only the first time one steps on it, or shorten the text messages. E.g., right now, when you step on the black hole, it tells you first that you stepped on a black hole, then the second message tells you you get a tear point for answering the question wrongly. This could probably be consolidated into 1 message.
Anyhow, I hope people find your game useful! I don't think I ran into any bugs, so good job!