Detect key press combos for further evaluation

Player.gd

extends KinematicBody2D

const COMBO_TIMEOUT = 0.3 # Timeout between key presses
const MAX_COMBO_CHAIN = 2 # Maximum key presses in a combo

var last_key_delta = 0    # Time since last keypress
var key_combo = []        # Current combo
	
func _input(event):
	if event is InputEventKey and event.pressed and !event.echo: # If distinct key press down
		print(last_key_delta)
		if last_key_delta > COMBO_TIMEOUT:                   # Reset combo if stale
			key_combo = []
		
		key_combo.append(event.scancode)                     # Otherwise add it to combo
		if key_combo.size() > MAX_COMBO_CHAIN:               # Prune if necessary
			key_combo.pop_front()
		
		print(key_combo)                                     # Log the combo (could pass to combo evaluator)
		last_key_delta = 0                                   # Reset keypress timer
    
func _physics_process(delta):
	last_key_delta += delta                                      # Track time between keypresses