Really neat game! At first it looks simple, but I played a few times and realised there is a ton of pretty neat details and mechanics such as seeing the spider's abdomen shrinking and indicating how much web you have left. The way the webs are tied together procedurally is really nice and can create visually appealing patterns. I also realised that the more flies you have in your web, the more points you score, but the more fly you have, the more chance you have to have your web broken. This is great design.
One thing I would critique is the fact that you don't see the exact number of webs you have and have to guess when your spacebar split web shot is available, but other than that the game is amazing!
Great job!