I understand this might be a coincidence. Yet, it truly amazed me, because I watched tutorials on game development and there are some games, which you can clearly see are little similar, but not as much as your game and Alex's game, it's like the same color pallet, font, I mean, mechanics might be the same and the gameplay, the premise overall can be the same, but even the little details are very, very similar. Just strange, it's all.
Edit: For example, if it was from a tutorial, I guess you would have change a color or font, I don't think those 2 are very important to make the game as mechanics. I understand the mechanics are same, but font? I don't know.