(hopefully the GIF works) I am having an issue where the character collides with the ground and stops, but doesn't register that it is on the ground (and thus, cannot be moved.) I tried to copy the Dynamic Platformer Demo in order to avoid issues like this. :disappointed: The code for the player is below:
extends RigidBody2D

#This code is heavily based on one of the 2D platformer demos
#for Godot Engine.  The demo in question was created by
#Juan Linietsky.  This game is built more for my own amusement
#and learning than anything else.  It has been a while since I
#worked with Godot; so I feel that this would be a good way to
#refresh me on the program somewhat.

var anim = ""
var siding_left = false
var jumping = false
var stopping_jump = false
var shooting = false

var WALK_ACCEL = 800.0
var WALK_DEACCEL = 800.0
var WALK_MAX_VELOCITY = 200.0
var AIR_ACCEL = 200.0
var AIR_DEACCEL = 200.0
var JUMP_VELOCITY = 460
var STOP_JUMP_FORCE = 900.0

var MAX_AIRBORNE_TIME = 0.15

var airborne_time = 1e20
var shoot_time = 1e20

var MAX_SHOOT_POSE_TIME = 0.3

var bullet = preload("bullet.tscn")
var floor_h_velocity = 0.0
onready var enemy = load("res://enemy.tscn")

func _integrate_forces(s):
	var lv = s.get_linear_velocity()
	var step = s.get_step()
	
	var new_anim = anim
	var new_siding_left = siding_left
	
	#controls go here
	var move_left = Input.is_action_pressed("move_left")
	var move_right = Input.is_action_pressed("move_right")
	var jump = Input.is_action_pressed("jump")
	var shoot = Input.is_action_pressed("shoot")
	var spawn = Input.is_action_pressed("spawn")
	
	if spawn:
		var e = enemy.instance()
		var p = position
		p.y = p.y - 100
		e.position = p
		get_parent().add_child(e)
	
	#undos previous floor velocity
	lv.x -= floor_h_velocity
	floor_h_velocity = 0.0
	
	#finds the floor
	var found_floor = false
	var floor_index = -1
	
	for x in range(s.get_contact_count()):
		var ci = s.get_contact_local_normal(x)
		if ci.dot(Vector2(0, -1)) > 0.6:
			found_floor = true
			floor_index = x
	
	#
	if shoot and not shooting:
		shoot_time = 0
		var bi = bullet.instance()
		var ss
		if siding_left:
			ss = -1.0
		else:
			ss = 1.0
		var pos = position + $bullet_shoot.position * Vector2(ss, 1.0)
		
		bi.position = pos
		get_parent().add_child(bi)
		
		bi.linear_velocity = Vector2(800.0 * ss, -80)
		
		$sprite/smoke.restart()
		$sound_shoot.play()
		
		add_collision_exception_with(bi)#makes the bullet and this not collide
		
	else:
		shoot_time += step
	
	if found_floor:
		airborne_time = 0.0
	else:
		airborne_time += step#times how long spent airborne
	
	var on_floor = airborne_time < MAX_AIRBORNE_TIME
	
	#the jump is processed here
	if jumping:
		if lv.y > 0:
			#sets of the jumping flag if going down
			jumping = false
		elif not jump:
			stopping_jump = true
		
		if stopping_jump:
			lv.y += STOP_JUMP_FORCE * step
	
	if on_floor:
		#processes logic when character is on floor
		if move_left and not move_right:
			if lv.x > -WALK_MAX_VELOCITY:
				lv.x -= WALK_ACCEL * step
		
		elif move_right and not move_left:
			if lv.x < WALK_MAX_VELOCITY:
				lv.x += WALK_ACCEL * step
		
		else:
			var xv = abs(lv.x)
			xv -= WALK_DEACCEL * step
			if xv < 0:
				xv = 0
			lv.x = sign(lv.x) * xv
		
		#check the jump
		if not jumping and jump:
			lv.y = -JUMP_VELOCITY
			jumping = true
			stopping_jump = false
			$sound_jump.play()
		
		#check siding
		if lv.x < 0 and move_left:
			new_siding_left = true
		elif lv.x > 0 and move_right:
			new_siding_left = false
		
		if jumping:
			new_anim = "Jumping"
		elif abs(lv.x) < 0.1:
			if shoot_time < MAX_SHOOT_POSE_TIME:
				new_anim = "Idle_Gun"
			else:
				new_anim = "Idle"
		else:
			if shoot_time < MAX_SHOOT_POSE_TIME:
				new_anim = "Run_Gun"
			else:
				new_anim = "Run"
		
	else:
		#process character information in the air
		if move_left and not move_right:
			if lv.x > -WALK_MAX_VELOCITY:
				lv.x -= AIR_ACCEL * step
		
		elif move_right and not move_left:
			if lv.x < WALK_MAX_VELOCITY:
				lv.x += AIR_ACCEL * step
		
		else:
			var xv = abs(lv.x)
			xv -= AIR_DEACCEL * step
			if xv < 0:
				xv = 0
			lv.x = sign(lv.x) * xv
		
		if lv.y < 0:
			if shoot_time < MAX_SHOOT_POSE_TIME:
				new_anim = "Jumping_Gun"
			
			else:
				new_anim = "Jumping"
			
		else:
			if shoot_time < MAX_SHOOT_POSE_TIME:
				new_anim = "Falling_Gun"
			else:
				new_anim = "Falling"
		
	#update siding
	if new_siding_left != siding_left:
		if new_siding_left:
			$sprite.scale.x = -1
		else:
			$sprite.scale.x = 1
		
		siding_left = new_siding_left
	
	#change animation
	if new_anim != anim:
		anim = new_anim
		$anim.play(anim)
	
	shooting = shoot
	
	#apply the floor velocity
	if found_floor:
		floor_h_velocity = s.get_contact_collider_velocity_at_position(floor_index).x
		lv.x += floor_h_velocity
	
	#apply gravity and set back the linear velocity
	lv += s.get_total_gravity() * step
	s.set_linear_velocity(lv)
If anyone has questions please let me know.