This was a really neat puzzle game. I like the mechanics.
Also the opening puzzle threw me off on solving the others, but I got it quickly. Something you might want to keep in mind as you develop this further.
The introduction puzzle puts you in mind of a phone screen, in fact I mentally read it as connect 4 to 3 to 2 to 1 even though the game did not show that.
Having it not be straight would be just enough I think to change the mindset of a player.
