Suprisingly clever score chaser. Initially I thought there wasn't much to it but the way the web is created is quite satisfying and then it became addictive when trying to catch as many flies as possible.
I especially liked how the spider's size communicates the amount of web left; great idea to reduce UI clutter. In future iterations I could imagine the web doing more things (flies getting stuck on the strings themselves) while adding new insects that break the web when crawling through it or insects that cant be caught at all.
Only bugs I noticed is the out-of-bonds web mentioned below and tutorial images all being black squares.