Dark Castle Escape is a hard adventure game about a monster who wears armor. It won't fight anyone, though. The only enemy is someone who isn't skilled enough to handle all risks.
It's a clicker, so you have to tap on the screen to get up off the floor. You can fly, which is a superpower. But you have to find the right mix between clicking to stay in the air. Being at the top all the time isn't the best plan. Some places have sharp spears that will kill you if you touch them. You'll also have to avoid spinning sticks with spikes and other hazards.
It's a game with no end. The only goal, then, is to go the farthest. The number of stars you get also affects how well you do.
Have fun and good luck!