A really original idea and a very nice gaming experience. The night part is very atmospheric!
I like how the theme of the jam was interpreted, also very original. For the rest, I won't repeat what has already been said, except that I ended up avoiding spiders rather than facing them too. ^^"
The green of the ground confuses me, however. I don't even know why. Maybe I was expecting a earth-like brown or a moon's surface-like gray? I don't know why, but I find that it somehow tones down a bit the otherwise spot-on creepy atmosphere.
Good job and congratulations for the originality!