Or: “Arch You Serious?”
A sort-of incremental game.
Wherever you click, bolts shoot out in all directions.
At the start, of course, only ONE bolt shoots out in a specific direction. (Maybe the direction is fixed too, and upgrades are needed to make it rotate around so you can choose it.)
You can upgrade this to more bolts, faster bolts, more powerful, which stay alive after first hit, faster reset time, etcetera.
Should work great. Just not a clear theme/hook/unique challenge that interested ME enough to make it. Maybe if you theme it around archery or something.