Short and sweet (pun intended) and with a bit more days to work on it I am sure you could make something awesome! That being said, the world you made was cool with the pixel art of the world being pretty impressive! Some areas I would focus on if you plan on working on the game more would be the opening cutscene and the gameplay itself. Memorizing the keys without any input or visual didn't really click with me. Still, you did a lot in 17 hours so consider this a success!