Good concept. But at the moment it is not interesting to play.
1. The sound. By default, the sound is turned off. When I played the game for the first time I thought that developers forgot to add it.
2. Buttons. They look good. But I lacked a small detail: when the cursor is on the button it reacts somehow. The easiest way to do this is to change the "color albedo" in the component "Button" - "Highlighted color". So when you point on a button it will show(become transparent) that you can interact with it.
3. The system of aiming: the player does not feel any response from the game. For example, a character can stretch a little like a bowstring while aiming.
4. When you stand on the edge of the map, you can't aim properly because the border of the screen. It would be nice to add the ability for the camera to follow the cursor abroad for easier aiming.
5. And you can also edit the file "index.html" in the project folder to remove the bottom strip. Because it looks a little ugly. And make it possible to stretch to full screen and not to 960px X 640px as default.
Of course, it's up to you to add changes.