The concept here is great, but I don't think the scoring is actually working. No matter what I do, including glitching into the ceiling so they climb as high as possible, the score is still 0. I think what would actually help a lot is having a 75/25 split between physics objects and non-movable objects. That would make it more of a platforming game where you need to jump as high as possible. Because all of the objects are physics-based, they fly around randomly and don't let you stand on them for more than a second or two before the spiders go up that high. Here's what it looked like when I glitched the game. Haha.
I get this issue oft, you need to go through the door that opens about every 12 seconds to complete the level and get points, I will better mark the door in future versions.