If you aren't putting an agenda agenda faceup into a remote behind some of the cheapest off-the-shelf ICE Weyland's defense researchers slapped together and smiling smugly at the runner turn 1, you're playing BANGUN wrong. If you ever refer to BANGUN without using all-caps and don't say it like BANG-GUN every time, you're playing BANGUN wrong.
OK, I'm joking. But just a little.
BANGUN, as the name and ability suggests, plays aggressive. Very aggressive. In the vast majority of games I've played, I've done the turn 1 I just described -- slammed down whatever agenda I had in my opening behind a Descent or Maskirovka, balanced my budget with a few Key Performance Indicators, and passed the turn. That's because BANGUN agendas thrive in the wild, not in cozy central servers. Unlike beloved Argus Security: Protection Guaranteed, BANGUN only BANGS when agendas are installed faceup in remotes. Like a bird of prey swooping down on newborn rabbits, the runner can snatch your vulnerable projects from the nerds in R&D and the suits in HQ with 0 (immediate) consequences. That's not OK. Your agendas need the trial by fire of the remote. Shove them out there. Let them be free. Hire Angelique Garza Correa to babysit them and keep them amused. Just don't let them languish in centrals.
That's the main thing, really. Go fast. Go hard. Give the runner catch-22s at every turn -- Do they take the sure thing, and bite the bullet (literally) by running your remotes? Or do they run your centrals hoping to win off random accesses -- some of which Byte! or are a sight to Behold! If they let you score, pressure with Measured Response. If they go aggressive, follow their Public Trail and show them what lies at the End of the Line. For real plays, Play Public Trail when they have the money to dodge it, THEN play Measured Response and kill them.
If you lose your steam, grind the runner through a Biawak or 2, courtesy of your Eminent Domain.
BANGUN is all about giving the runner as many bad options as possible.
BANG!