Hey, Apparently, the creator cannot reply due to being a guest. So, he had sent me this saying, and I quote: "Its simple. there where tons of german states before reunification. The spray represents numerous german states being gobbled up by other German states until only Prussia was left which was when the act of german reunification happened so thats why Prussia became Reichtangle. the germans then proceed to get African colonies and the want for more clay so that represents the last pannel. Mostly this comic is for comedic affect."
For evidence, I have his discord tag here, ☭ Mighty Katyusha ☭#0914