Very interesting concept and art, but the controls were a major sticking point.
The combination of jumping and swinging seemed glitchy as holding the jump then the web would more often than not fail to deploy any web.(especially when going right to left)
I also found the arrow keys barely changed the direction of the web and the fact that they also controlled movement meant that more often than not you were going to miss.
The fixed length of the web also made swinging very difficult in places, as you would either get caught on the edge of the platform you were jumping off or hit the edge of the platform you were aiming for.
All in all these control problems and very little story given in the beginning other than "we are going to war with the flies" with no real reason or explanation caused me to lose interest very early on.
That said there is a vast amount of potential for a extremely engaging and fun game. I very much hope to see more come of this.