level 2: upon leaving your house, head right, take the teleport. continue to go right past the windmill. theres level 2's entrance.
level 3 and 4:
in level 2 there is a cabin with a fast travel point in it. use that for convenience. level 3 is the cave immediately right, level 4, drop down a layer, its smack dab in the center. these wont be unloked untill you beat the former level, so don't be shocked if you don't see anything yet.
level 5: after leaving your home, head left toward the shop, continue to go to the farm. the teleport is above the farm. simply go inside the building and use it to head upstairs. the doors aren't marked with the green teleport aura, but I assure you, you can enter those doors.
yes. at some point, the shop will hold, in the accessories area, a pair of cat ears called something like "the cat ears of training". hold your phone up to it and use google translate. should be on page 3. equip it, and all enemies become hostile. return to boss arenas to refight.
