You can’t create the non-rectangular shape in Hype but you can add SVG code inside a rectangle and then proceed to give parts of the code id which you can attach event listeners (in a function on scene load) to such as mouseover and click. These listeners will only react to the parts of the SVG. So you won’t have the problem of the bounding box.
Here is an example with 1 rect with SVG code and another on top partially covering the mouseover area.
https://dl.dropboxusercontent.com/spa/wkk989fyyvlf2kz/Exports/clickableSVG/clickableSVG.html
This is a workaround until Hype creates shaped elements