Love the game! I don't think that moving before/during falling is intentional, but it adds a lot of complexity and makes the mechanics feel deeper. For example i love mining under bombs and then moving away lol, it makes digging with bombs so much easier! (though it does make safe bombs not worth buying). I got up to the depth 270-ish, where there was a huge fall. Also the secrets feel like they lead to more, but I couldn't find anything other than the ghost miner that appeared after a few times of falling into different cracks on the sides