I made a video of your game! It's at the 6:39 mark of this video. 

Unique idea never played as a monster seal before

Interesting idea!

I was confused with the mechanics at first, but once I got the hang of it, I was able to beat it without too much trouble. One thing I didn't like is how the enemies can still chase and hurt you even if you have reached the next area of the map. At least the game will still allow to progress even if you die once you reach the goal. 

Really cool style and setting. The gameplay is nice, the only nitpick I have with it is that the final boss feels a bit disconnected from the rest of the game's mechanics, and some of its attacks are almost impossible to dodge. It would have been a lot better if the fight had some water areas you could use your seal form on to dodge the harder attacks.