Nimbatus is a game about making a drone armada and saving the galaxy... supposedly. I decided to have fun instead, and make a completely working calculator (it can only add for now). The game includes logic gates as drone parts in anticipation they will be used to combine key controls and drone sensors to make controlling the drone easier, but I chose to make a calculator instead. It has a whopping 1 byte of RAM and 4 7-segment displays. unfortunately, I didn't record my mouse, but just know the input values are stored in the 4x4 grid immediately above the base, and the 5 lights below the base is the sum in binary.
For more on Nimbatus, go watch Lathland's playthrough; he is much too practical for me.
(this took 5 hours to make)