Kirby's Adventure Restitched

All of the worlds in Kirby’s Adventure are contained in one level door, and all the levels in each world are stitched together - you play 1-2 immediately after 1-1, with no break in between, and continue in this fashion until you beat the last level in world 7. The bosses are accessed through the other doors.

The game isn’t any harder, but all of the switches were removed. Finding the areas that would’ve led to the switches will reward you with some 1-ups.