Additions / Major Changes

Overlay Clouds no longer have their transparency hard coded. it is now defined via the .png file
Added Toggle Spikes, which are generic spike blocks which can be turned on or off, via gizmos
Holding Shift while connecting a signal, will allow you to immediately start connecting another signal, from the same inital object
Track riders, now emit a pulse, once they either change direction on a track, or reach the end and fall off.
Merged HCB + Tristan35's JSON cleanup PR #1102
Resource pack config files can now have descriptions, which will show up in the menu
Level Packs now have a level select and world select, with the level icons being changable the same way as they can be in resource packs
Merged #1103, added sequenced variations (To be added to the Wiki.)
Merged #1105, added quest variations (To be added to the Wiki.)
Player sprites now have a "LevelTransition" optional animation, which is used, for the level transition screen
Added Level metadata, which allows for variations for specific levels, to be set via the themes.json file (To be added to the Wiki.)
Merged #1111, overhaul of json parser, and error handling.
Merged #1107, added wing metadata, to differentiate which entities has the wings (player, koopa, etc)
Added a deadzone feature to the controller settings
Added a "maximized" setting to the video window mode.
Window sizes now get properly saved and applied (so long as your in the "unlocked" size, because of a godot bug)

Fixes

Fixed the winged koopa animation, not playing on spawn
Marathon results sfxs are now replacable
fixed goombas not using track riders properly, after re-testing a level
Fixed cheep cheeps having a hard coded animation, now properly uses the json animation
Fixed thwomps force looping their animations
Fixed door animations being a bit wonky
Fixed the players "swim_stroke" property, not being applied properly.
Fixed bullet bills not properly despawning, when off screen, if youve been to the editor previously
fixed bowser jr spamming fireballs when off screen
Fixed hammers held by bowser's bro not having the "IsBowserBro" metadata.
Merged #1101, fixing some levels in the night time wordlds that werent marked as night time.
Gravity Inverters have been moved to be in the same group as the Moon Gravity obj, instead of being with the generators
Fixed level packs not caring about "levels_per_world", and all the various bugs that came with it
Fixed On Off timers being active while in the level editor
Fixed game overs not working properly, in level packs
Fixed fireballs and superballs not despawning properly, if they were spawned off screen.
Fixed some accuracy errors in the level design of SMB1 8-4
Fighter flys now face the right way (originally were flipped)
Sidesteppers now can use the "can_turn" property
Fixed LL's classic bounce height, not being applied to ANN