Link to CONTRIBUTING.md (#637)

Merge pull request #639 from TKanX/fix-reverse-path-goal

fix: Allow reverse path goals in level editor

Oops

Remove puzzles from loading screen

Disable hiding of "Show All" button

Fix editor panel popping up over world map

Fix gridlines offset in low-res settings

Comment

Match path goal handles to graph height

Change "Editable" to "Editor"

save path goal end position in editor

Prevent browser throttling editor URL updates

Fix sledder changing in level editor

Remove dead code