Visuals
1 ... no GUI user feedback in main (mouse hover, click)
2 ... check out more complex parallax effects (but I am not sure if it would fit your current platformer)
Controls
1 ... work as intended
Design
1 ... what? Godot Level this made me laugh
2 ... simple 2D platformer
Sound
1 ... classic, works all the time
Bugs
1 ... (visual): get key -> run past door -> animation next LV is still there (its little confusing to see)