I liked the use of the theme and it was pretty fun. I'm also surprised by the amount of content you were able to add (i.e. upgrades and even a "How to play" guide. However, I feel like the slingshot combat was somewhat difficult to work with since moving the player in one direction but also wanting to attack the boss with a slingshot would result in having to move the mouse on the opposite direction. Also, this isn't that big of an issue but there is a bug with the "How to play" guide where if you press the back button, it will always take you to the bosses section. Overall though I like it.