All the rooms of area 4 are done, they still need some tiles, and the outside of the tower is still made of dull square blocks, but it´s playable.
After the first test I noticed how small and simple this area is, compared to eralier ones. I did add some scripted surprises inside the tower, and even if it´s bigger than the original, it´s not enough. So, I was thinking on adding some extra rooms below the tower, so what we really visited in Metroid 2 was the upper part of a bigger structure, buried inside the cave.
The Chozo are one of the most mystical and advanced civilizations of the universe, and they decide to make a tower in the deep underground of a dangerous planet... they must have a GOOD reason to be so unpractical.
Anyway, another problem I found is the main cave room. In this case, rooms are parts of a level that are separated with transitions, it could be a single screen, or a huge cave. The bigger the room, the slower the game gets.
When I tried the game on a slower PC, the framerate crawls down to 20FPS in that room. So, I think I´ll have to divide it into 3 smaller rooms to make it faster. After all, if you´ll spend a lot of time climbing the tower, it better be fast.
Last but not least, thanks to JayCity from Botkun Workshop, portuguese speaking people can read the FAQ in their language: informação no português