Voice-over: nice, sounds (especially the music): very good fit.
Visually it was a struggle. Text in the menu's was hard too read and the game itself was just too dark. So much, that I was hit and died by something before I could understand what happened.
Second time, I did notice the skeleton, but whatever I did, I was seemingly unable to defeat it ( that could actually be a lack of skill, haha ).
In general, I think you should have this tested a bit more with the audience next time, so that they can give feedback on their first experience. I think tuning the light would have been an easy fix and have tremendous impact on the first experience.
Still though, for just a small jam, this was a very good effort!