ShapeHero Factory

Here is an excerpt from ShapeHero Factory's Steam description:

Welcome to the world’s weirdest factory. You don’t swing swords or cast spells, instead you build tiny heroes out of shapes, and hope for the best as they come up against endless swarms of increasingly brutal enemies. All in a day’s work!

Build it weird. Build it strong.

• Drop shapes onto conveyor belts to craft self-operation heroes.
• Want a soldier? Try a circle and a triangle.
• Want a tank? Try circle and square.
• Heroes fight on their own, you’re just there to make the decisions.

Every wave is a test.

• Enemies get weirder, stronger and ruder as you progress
• Defend your Portal from swarming pests and brute squads
• Earn magical artifacts and upgrade your factory like there's no tomorrow.