In every line printed here this is the conditional 으면 crushed down in fast speech: if you do not like it, quit; you just have to enjoy your age; we will be entering Gunpo in a bit. It turns up especially inside wishes, where 았으면 좋겠다 becomes 았음 좋겠다, as in the lines wishing every day had five meals and that fish-shaped bread got famous abroad. Korean also has a separate 음 that turns verbs into nouns, but none of these lines are that one.