stego challenges

[60 Points] Digital Cube ✅
[40 Points] Forest ✅
[30 Points] Pusheen Loves Graphs ✅
[50 Points] Retro ✅
[50 Points] Senseless Behaviour ✅
[70 Points] Not Art ✅
[100 Points] Massacre ✅
[20 Points] Image Processing 101 ✅
[100 Points] Unprintable ✅
[30 Points] blackSquare ❌