I was gonna give this a 5/5, but there are literally a few (arguably 2) things that make the game unfinishable.
1. Choosing the Bow over the Pole leads to missing out on a ton of the game. Should just remove the bow guy until the player has chosen the pole. It is UNFAIR and simply bad game design to punish people that harshly over a "left or right" choice.
2. Shooting the horse and making it dead makes the player restart the whole game to see what happens if you don't. This one is easily fixed by allowing the player to resume from capturing the horse. Shouldn't be hard.
But alas, those are some serious design flaws! In any other game, gaping holes like this would've made them go from a 5/5 to a 2/5. So why a 4/5? well...The game is easy to replay from the start, and the game itself is very entertaining. You keep wanting to play through and try "off the path" choices to find everything. Sadly, the game also punishes you for that while also encouraging it. =(