Heyy! Just took a quick look at the store page, and I gotta say there's a lot of information that tells a lot about the game, but as I usually say when it comes to game jams and such: introducing the game's controls and mechanics in the description makes it almost certain nobody will know how to use them in game.
On the other hand, I think the FAQ feels a bit redundant regarding the information you already wrote in the description. First answer starts like "This should have been clear by now", but that's an assumption of a result that you have yet to prove, because you know the mechanics by heart, but how can you know your potential player has learnt them already? Personally, after reading the whole page, I didn't feel like I grasped how it would feel to play the game, and I think the demo should do the heavy lifting, because trying to sell your game by going in deep through the game mechanics feels like trying to sell a board game by making the player read the instruction manual.
In conclusion, I would try to make the demo do the job of telling the player they should play this game, and try to keep the description as short as possible, especially since your game is heavily based on mechanics. I hope you found this helpful!