It's my first time playing this game. I can smash through tombstones and stuff, but then all of a sudden I can't move, click or do anything and I die. It seems I can only get so far and not uncover a lot of things. Is it a game problem or is it the way it's made?

You have a limited number of moves, listed at shovel points on the right side of the game screen. If you run out before you reach the bottom, you'll lose

Oh! Thanks for telling me :)