So, I played your game. Everyone loves a platformer.
But.
You placed obstacles that would be tough in a lighted game, in the dark that only magnifies them to the point of frustration. I almost stopped playing.
There should be way points after so much progress so when you do die in the abyss, you are brought back to a way point.
The level is good.
The player mechanics are excellent, especially the high jump and how you can control the jump
The physics on the little lighted guy is good. It is a very simple, clean game. For a game jam it is perfect. Expanding on it would need more little doo dads like power ups, treasure, definitely enemies.