lastlegacy.us

Title basically sums it. If you make it to the boss and play it in hard mode, you can climb up to the winged boots(only obtained in hard), quit to overworld, sell them, go back, rinse and repeat, as many times as you want. You can then have enough currency to upgrade the hell out of your weapons and accessories.

I honestly don't think this was intended?

I actually think it kinda was. I mean, seriously, once you've got the winged boots, you've got nothing more to do than killing the final boss and find the last Large Squares.