Different genres have different trends when it comes to leveling instruments. Eg. it's common to push the kick/snare/bass up in hip-hop music for a thumping groove, but in rock, the guitar tends to shred near the top of the mix where the bass/kick take a backseat. This is all to say, there's no universal 'standard' for mixing sounds an different styles take different approaches. Even within these genres, there are so many banging exceptions.
That said, how do you like your chiptune mixed? Do you like your bass heavy or do you prefer a 'felt but not heard' approach? Do put your lead upfront for presence or do you prefer it low to give everything else more space? Ever heard a chiptune track and thought "Wow! That's mixed so well!" ... I'm curious if anyone else thinks about this as much as I do ＾▽＾'