+ src/ui/history.c
+ src/ui/list_selector.h
+ src/ui/list_selector.c
+ src/ui/wiggly_text.h
+ src/ui/wiggly_text.c
+ src/ui/slider.h
+ src/ui/slider.c
+ src/ui/grid.h
+ src/ui/grid.c
+ src/game/level_metadata.h
+ src/game/level_metadata.c
+ src/game/level/level_editor.h
+ src/game/level/level_editor.c
+ src/game/level/level_editor/color_picker.h
+ src/game/level/level_editor/color_picker.c
+ src/game/level/level_editor/rect_layer.h
+ src/game/level/level_editor/rect_layer.c
+ src/game/level/level_editor/layer_picker.h
+ src/game/level/level_editor/layer_picker.c
+ src/game/level/level_editor/point_layer.h
+ src/game/level/level_editor/point_layer.c
+ src/game/level/level_editor/player_layer.h
+ src/game/level/level_editor/player_layer.c
+ src/game/level/level_editor/layer.h
+ src/game/level/level_editor/layer.c
+ src/game/level/level_editor/label_layer.h
+ src/game/level/level_editor/label_layer.c
+ src/game/level/level_editor/background_layer.h
+ src/game/level/level_editor/background_layer.c
+ src/game/level/level_editor/undo_history.h
+ src/game/level/level_editor/undo_history.c
+ src/game/level/level_editor/action_picker.h
+ src/game/level/level_editor/action_picker.c