Yah I used the TileMap component in unity to make this but because some of the art has rocks that jut out it can sometimes cause the player to clip through the boundary. I tried to fix some of the more egregious ones by adding a small tree stump to block players (and the enemies) from getting clipped in tight corridors between rocks.
But if it makes the game more fun, then Ill say it was 100% designed like that and definitely not a bug lol :)