Quite fun! The aesthetic is nice and chunky :). Showing the area of attack of a "tower" on hover would be quite useful. And tooltips in general. When you get coins at round end, the black shadows on the water made me think at first that something was on fire! If the shadows were darkish blue instead of black I think it would be more clear. Keep up the excellent work!
By tooltips in general, did you mean tooltips when hovering over towers, or were you thinking of something else? - I didn’t think of that, but I like that idea, as well as showing the range when hovering over a tower.
I’ll look into the colours of the shadows as well. Thank you for trying it out and for the input!