Changes

=== Terrain ===

=== Terrain ===

[[File:Underwater_Biome.png|thumb|160x160px|A starting position of a Underwater Biome.]]

[[File:Underwater_Biome.png|thumb|160x160px|A starting position of a Underwater Biome.]]

The Underwater Biome is a bonus biome of the sorts that can be entered using any of the randomly generated, secret mineshafts that are hidden across the first 3 biomes.

The Underwater Biome is a bonus biome of the sorts that can be entered using any of the randomly generated, secret mineshafts that are hidden across the first 3 biomes. When you see a mineshaft surrounded by the streams of a nearby waterfall, you can build tracks there and connect to the lone track within the mineshaft. Your train will then speed up towards the mineshaft, then enter a transition phase into Underwater where the train is slowed and a flashing warning symbol appears over your train's engine.

 

If players choose not to enter the secret mineshaft, it will explode upon loading the next level.

=== Threats ===

=== Threats ===