I think it's not inflated. The gameplay loop in your game is forgiving enough to let player learn in their own pace, but easily adapting to the skilled player. The skill tree is really thought out and navigating it just sounds and looks good with the effects you added. I played 6 of the top enjoyment games so far, and yours is one of my favourites. But it's true that more ratings may have brought some games down, for example Boris of Oris is 82nd with 72 ratings but is more enjoyable then some of the top ones. Eh, I mean it also depends on the person playing, but your game IS that good for many people