Hi @simulacrumgames, I really appreciate what you’re doing here. I collect all the Free Monthly (and other Free Assets). Its one of the events I look forward too at the beginning of the month 
I too felt the need to do something fun with monthly assets and previously attempted to organize an open-source Team project “Project RUCKUS”. The intent was to build a Full Game utilizing mixed assets free from the marketplace.
The challenge was figuring out an cohesive aesthetic and plot to bring mix matched assets together. I came up with Cel-Shaded Hybrid FP/TP Action RPG Shooter. Sadly, the project was cancelled due to lack of participation. But, Your Series has rekindled my desire to revisit the idea.
Keep up the AMAZING Work!