Hey, that was a pretty neat reward in the chest - glad I opened it! I have gotta admit I brute-forced it but assumed it was the angle of the circle: I might be wrong! Quite an eclectic mix of assets, but very much distinctive and I liked the background text that told the story. 

I like the concept of having just a code and you just figure out what you need to do.  Maybe it needs a little more work but overall. Good work~