Hey!
First of all congrats for finishing the game! It was a lot of fun to play it. I love the puzzles, the one with the desert was very tricky but I got it in the end and I finished the game too! It was really fun.
If you want some feedback, here's mine: I think you used different pixel art packs but the fact that some pixels are bigger than the others make the game look very inconsistent. Also, the player was not pixel art really. But other than that, it was a very enjoyable game and I love it. It shows how much work was put into it! Congrats to you!
I would love to have you playing mine too, if you don't mind of course! ^_^