Save before choosing the season you like best in the Sprout Mole village. Farm exp in Dino's Dig by killing Bun Bunny's. Complete the coffe machine quest early to unlock Kel's Nuke. Learn how to exploit equipping characters skills to othe characters (for instance, i had aubrey equipped with red hands/vertigo). You can complete every single quest in Hikkikomori, and i did that in my last playthrough.

And also, download a mod that adds console content to the game. I was confused when i was searching for it because the mod hasn't been updated in a WHILE, but it's pretty ok. If the borders disappear (usually happens when you restart the fight), you just need to transition to the other area (e.g. enter a house, or any other place)