It didn't feel too great to be limited by such a low jump, but I think there is a lot of fun to be had if you get used to it, but also I found that I got the game to the point where it became unplayable due to what I shot. If there were secret hidden no-collision walls, they were not telegraphed so, not sure what to look for. For the sake of learning experience, I'd say it's never a good idea to put your player in a position that they feel locked down so, if you have alternatives, there has to be a way from them to be prepared what to look for at the beginning of the game, perhaps some very subtle sparks of flickering of bugged areas?