Yep. Same has happened with me with Lemmy in world 2. Time to grind.The game started off very easy, but the difficulty ramps a little later. Clearing the second area of the game, and a boss wiped me out. It was nice to have my ass kicked. I haven't been using the eggs to level my monsters up, but it looks like I'm reaching the time to do so.
I can also see me grinding areas for the pieces to evolve monsters.
You can use them to buy random items later on in the game (it works sort of like the Toad Houses in SMB3, but you have to pay ten coins each time).What do coins do in this game anyway? I didn't see anything in the tutorials or anywhere.