Large

* Added an extra hint to show how the mutation mechanic works, shows up when hovering locked body parts
* Made underwater temperatures and seasonal effects less extreme
* Remodeled the 'early lobe' fins to be more sideways oriented, so they look better when the animals drag themselves on land
* Fixed mutation chances being (much) smaller than the UI claimed they were

Small

* Made greenhouse level less hot, as even the toughest plants could no longer survive
* Egg types can now also mutate
* Implemented the 'mutate alga' button in the alga detail view (did nothing so far)
* Swimming animals now gradually slow down when they reach their target (instead of abrupt stop)
* Optimization: only show alga holdfasts when up close
* Optimization: stop alga animation when not visible
* Added explanation: land animal with aquatic eggs went extinct because it could not reach water in time to lay its eggs
* Added explanation: aquatic animal with land eggs went extinct because it could not reach land in time to lay its eggs
* Fixed inaccessible area in the east of each sandbox map
* Animals can no longer walk on steep terrain (but plants can grow there!)
* The seasons editor no longer glitches out after the deleting the last season
* Fixed confusing animal editor warning for nest builders that are too heavy for their legs
* Fixed hibernation slider availability when opening the animal editor
* Fixed crash when randomly mutating algae after loading a savegame
* Changed the starter level to have water until the edges
* Changed the default egg type in the sandbox to the intermediate stage (instead of the aquatic egg)
* Decreased chances of animals flying through mountains
* Completely removed former primitive limbs and mouths from the game (they could still show up because of random mutation)