Nice graphics, but the game is kinda hard (or i am just to sleepy :P). But i have found some programming issues:
1. sword hittest is awkward: a lot of times u actually "collide" with air and not with sword itself. For simple solution make 2 hittest boxes - one for blade and one for holder (i hope u know what i meen). U can also try to google out pixel point detection
2. you can walk in water below platforms. This should be fixed too

Much fun at developing, cheers

Nice game. It still needs improvements, but overall i like the idea :D