In all honesty, GOIO isn't the most optimized game in the world. And since 2007, nothing runs as intended on PC.
Muse still have some work to do to smooth out the game.
Adding to this offtopic, Muse says on their site that minimum requirements are:
- Windows 7 or Mac OS X 10.6 or later, or Ubuntu 12.04 LTS, 32-bit
- 2 GHz processor
- 2 GB RAM
- Dedicated video card with 256 MB VRAM
- 3 GB available HD space
- Broadband Internet connection
Sadly I had the "pleasure" of playing GOIO on older computer (I'm having mine repaired) which has
-Dual Core 2,6Ghz processor
-4GB RAM
-Dedicated video card with 512MB memory
And the game set to 1300-something x 700-something resolution, with all graphical options set to LOW or DISABLED was pretty much unplayable (10-20 fps). This speaks for itself I think.
About the bridges - I used to bump into them all the time
For me they hold no tactical potential (at least I'm not using it) but they probably aren't that much of a hassle to render. Personally wouldn't mind them removed.