Thanks for trying out the game! The variable-distance roll is a great idea. I'll include that in the next major update.
The skulls are difficult - right now, they don't have a cooldown after they cause damage (like everything else in the game). I think adding that back in would make them less of an issue (without decreasing the difficulty too much).
I agree that there need to be some UI updates on the camels getting attacked. I like the risk-versus-reward mechanic of choosing to explore a cave for treasure versus potential damage to your caravan, but there could be better ways to communicate these things to the players. I want it to be 'risk damage to a camel for treasure' instead of 'lose an entire camel while you hurry to get back'. I'll put some thought into this.
I appreciate the feedback :)