This is a work in progress, coded using the canvas function in javascript and embedded in a simple html file.
Gameplay and layout is inspired by bloons tower defence, https://ninjakiwi.com/Games/Tower-Defense/Play/Bloons-Tower-Defense.html#.XPfyCIi6NPZ.
Goblin image created using blender model taken from https://www.blendswap.com/blends/view/72394.