Neat game! I would definitely recommend working on turning off collision between the player body and the sword if you want to keep working on this game in the future - while jumping into space or backwards can be fun, it can also be very nauseating.
Switching between weapons, which caused the night/day switch was cool! But I had to look at the comment section to figure out that was possible, in the beginning I wasn't sure what "stone" was, so didn't know to touch it. Also, the sword would keep falling out of my hand when swapped. A more clear tutorial may be helpful in the future!
It was fun to slash at enemies though and see them fall down and show particle effects!