I've been running into all kinds of bugs on level 5 that have made it impossible to beat the level. I've fallen through the zone map a few times which caused me to get stuck within the non-destructible landscape. After trying to cross the first bridge, both myself and my friend for the level seem to run into an invisible wall.
Still enjoying it, just thought you might want to know about those. :)
 "Zombotron 2: Time Machine"){kind=icon}
 "Legend of the Void 2"){kind=icon}