I remembered one old game that is very similar to this one that is extremely popular about 10 years ago. That's to say, the game has very interesting background and the layout of the game looks very good. I like the chasing part at the end of the game most because it prevents the players from getting bored.
Some suggestions I would say is that the enemy is too easy to defeat because once you left clicked the enemy, the enemy will be instantly died. I would suggest add some enemies that have higher health bar or have enemies that are shooting arrows toward the player. Also, for the final chasing part, the speed of the boss is too slow, making it easy for the player to escape. I would suggest either improve the speed or to make the map larger and more complex.