Link: https://iwilkey.itch.io/designa
Designa is an open-source sandbox tower defense game focused on creating effective systems to acquire and utilize resources. Use your resources to construct your tower any way you want. Then, place Blasters and other weapons to strategically to defend it.
Create elaborate systems of pipes that transport resources to machines that process them.
When midnight strikes, defend your base against increasingly smarter robot AI using realistic projectile physics and strategic weapon aim and placement.