I see the concept you are trying to bring forth, with a bit for more fleshing out and implementing core gameplay loop it can make an interesting strategy game. The terminal feature is nice and would make a great core mechanic.
I don't know anything about Gdevelop but if games logic is affected by the fps that means there's no separation between logic and rendering, maybe logic is not capped by delta time?
Great game! I wish there was an easier/faster way traversing the level when there are no enemies around though. Spent a good hour playing it, so far mage is my favorite class! And peace goblins are hilarious! Will definitely play some more when I have the time