Pretty cool
The graphics are well drawn and engaging. The JPEG artifacts aren't too noticeable except on the trees in the background of the underground forest. Otherwise everything looks great. I might complain that the characters are a little too anime for my tastes, but that's just my own opinion. The music and sounds add to the tense atmosphere, which adds to the overall effect.
Gameplay is smooth and fairly intuitive. Using E to interact is a little cumbersome. I think W might be more ergonomic. I would like to be able to use at least one of the attacks while jumping. I don't know how important that ability would become in later parts of the game, but it seems like a pretty standard video game ability.
Good work!