Hey i just finished your game and well i think there is potential in it. Your art is great, the atmosphere is cool, the story is simple and efficient ... But this is not really playable currently, for me at least ... On my computer this is not possible for me to jump high enough to go from plateform to plateform for example. This is the same problem for the movement speed actually, the player is extremely slow.
Anyway this is not a very big deal don't worry, i really think there is potential in your game.
Keep it up !