I love this, good job! Good idea and good design. You took the common repetitiveness of circles and silhouettes and created a totally new style. I would buy this shirt!
The text is fine except the "y" on "factory" is unreadable. And I like the colors of the design on the yellow shirt but not the yellow shirt. Will never wear yellow. I'm putting would buy anyway, but I think you need to try some other color options.
About my design