The Legend of Skull Kid is a really nostalgic and charming puzzle in the style of the original GameBoy Games. In fact you need a GameBoy Emulator if you want to play this game when you download it. I would recommend doing so as it gave my whole experience with this little game a good nostagic vibe (and there seems to be a bit of input lag with the web version for me).
Getting into the game was kinda rough tho. The safe option doesnt seem to work properly and I had trouble understanding some things initially. So making one mistake was really punishing as I had to start whole over if I died once.
Still I was intrigued by the puzzles you have set up in this tiny world and I have to say I really enjoyed them after all! It was quite fun to figure out how to achieve all 3 rings in the overworld. You used minimal graphics and hints to guide the player to the solution. It was hard at first but just enough information for me to being able to figure out the solutions after some time :)
The second floor/cave (great use of optional theme) didnt feel to hard to finish (which is good in my opinion). I think the skull puzzle of the dungeon was the only puzzle I was a bit disappointed of when I figured it out^^
Great job all in all, it's my favorite entry of the contest and you can be really proud of this little game you made in just a few days!
After some bug fixxing and maybe a few other minor tweeks when it comes to feedback from the game you get as a player while playing, this would be even better :)