I had fun playing this!
Couldn't figure out everything but I did get the final lock solved and the winning easter egg.
I enjoyed guessing what might combine with what to create something new -- sometimes I wanted to see things make stuff even though they didn't -- surprises like the unicorn were fun. Other times I felt I was just randomly dragging and dropping, which was a little tedious, but still exciting to find out what might be created.
Overall this was super enjoyable and interesting -- you made something special out of a straightforward mechanic and added intriguing visuals to keep it fun. The hints were so so so helpful - I would have given up if it weren't for those. Good choice to add them.
Keep up the awesome work!! The game worked really well!!