Deceptively hard. I thought it would be a piece of cake but then turned pretty challenging really fast. That's not a criticism - it's a compliment with how challenging it is with the limited number of variables you have in there now. You could add more things like variation to your arrow speed based on pull back strength to add a lot more skill, or arrow powerups, flaming arrows that cause chain reactions, exploding arrows that have AOE properties, and so on. Lots of opportunities here. Good stuff