Gravity lands should be easier to unlock

[jruderman]

Currently, all gravity lands require first completing the Alchemist Lab (which seems unrelated) and then the Ivory Tower (which isn't even the easiest gravity land). Some of the other gravity lands have additional unlock requirements and/or only appear in certain lands.

If I'm not specifically trying to visit the gravity lands, I won't even see them on most runs.

If I don't hold off on completing the Jungle until I've visited the Ivory Tower, I have to make two trips into the Jungle. Besides not being something I'd do naturally, it's made extra dangerous by two factors. First, apes appear in the Lost Mountain, so my second escape from the Jungle features a dangerous oversupply of rubies. Second, I may have completed the Overgrown Woods, making it likely that I'll encounter mutant ivy exploding into the Jungle.

[zeno]

Removed the Alchemist Lab requirement from Ivory Tower (and moved it to Reptiles) in 9.3b.

I think that Ivory Tower is the best at explaining gravity mechanics -- otherwise you would get lost in the Dungeon, or find it weird in the Mountain... Yendorian Forest is also a bit harder mechanically IMO.

[jennlbw]

especially free fall. that can be confusing for new players