What Unity components does a 2D platformer player need for gravity and ground collisions?

A player needs a Rigidbody2D for physics and gravity, plus a Collider2D to collide with ground colliders.

How do you create adjustable jump height in a Unity 2D platformer?

Apply upward velocity when jumping, then reduce it when the jump button is released early so short presses create smaller hops.

How can Unity background music continue between scenes without duplicate SoundManager objects?

Keep one SoundManager with DontDestroyOnLoad and destroy any newly created duplicate manager when a scene loads.

Free Course Image Unity 2D Platformer Game Development for Beginners (Player Movement and Menus)

Free online course Unity 2D Platformer Game Development for Beginners (Player Movement and Menus)

Duration of the online course: 5 hours and 7 minutes

New

Build 2D platformer skills in Unity fast with this free course—movement, animations, menus, enemies, UI and more, plus practical exercises.

In this free course, learn about

Implement 2D player movement with Rigidbody2D, gravity, collisions, and input handling
Set up Animator parameters/transitions to trigger run and hurt animations from movement/damage
Use BoxCast for reliable grounded checks and implement wall jumping mechanics
Build shooting with object pooling to avoid Instantiate/Destroy overhead and GC spikes
Align repeated ground tiles quickly using vertex snapping (hold V) for perfect tile placement
Create room-to-room camera movement using triggers and multiple virtual cameras/bounds setup
Design a health system with iFrames and clamp current health between 0 and startingHealth
Configure traps: enable BoxCollider2D IsTrigger so OnTriggerEnter2D damage logic fires
Implement enemy interactions and damage feedback, including Any State transitions for Hurt
Add audio management with DontDestroyOnLoad and singleton pattern to avoid duplicate music
Implement advanced jumping: variable jump height via early jump release/cut vertical velocity
Add checkpoints and disable the checkpoint trigger collider after activation to prevent retrigger
Handle game over and restarting by reloading the active scene using its build index
Create a pause menu by toggling Time.timeScale to pause/unpause gameplay

About the free online course

Learn how to build a solid 2D platformer foundation in Unity by creating the systems that make games feel responsive, readable, and fun. This beginner-friendly course guides you through the core workflow of developing a playable character and a complete loop of interaction, from the first jump to the moment you pause the game or hit game over. You will start by making a player that moves smoothly, collides correctly with the world, and reacts to gravity the way platformers should.

As you progress, you will connect movement to animation so every step and action communicates clearly. You will also add mechanics that players expect, such as wall jumping and advanced jumping for better control, and you will see how to validate grounding reliably to avoid frustrating edge cases. On top of that, you will implement shooting in a performance-conscious way, learning why efficient patterns matter as your scenes grow.

The course goes beyond character control by shaping the full experience around it. You will build clean visuals with properly aligned tiles, set up camera movement between rooms using triggers, and create a health system with temporary invincibility frames so damage feels fair. You will add traps and enemies with the right collider and animation logic, then bring everything to life with audio that persists correctly across scenes without duplicating managers.

To round out a playable prototype, you will implement checkpoints, restart behavior, and a game over flow, along with a pause menu that truly stops gameplay. Throughout the course, quick exercises reinforce key decisions so you understand not just what to do, but why it works. By the end, you will have the confidence to expand a platformer project, iterate on feel, and build menus and systems that make your game ready for players.

Course content

Video class: Unity 2D Platformer for Complete Beginners - #1 PLAYER MOVEMENT 15m
Exercise: Which combination of components is required so a 2D player can collide with the ground and be affected by gravity?
Video class: Unity 2D Platformer for Complete Beginners - #2 ANIMATION 21m
Exercise: How is the running animation activated in the Animator based on player movement input?
Video class: Unity 2D Platformer for Complete Beginners - #3 WALL JUMPING 17m
Exercise: Why is Physics2D.BoxCast preferred over a simple raycast for checking whether a 2D platformer player is grounded?

Video class: Unity 2D Platformer for Complete Beginners - #4 SHOOTING 17m
Exercise: Why is object pooling used for the fireballs instead of using Instantiate and Destroy each time?
Video class: Unity 2D Platformer for Complete Beginners - #5 GRAPHICS 09m
Exercise: What is the fastest way shown to align duplicated ground tiles perfectly next to each other in Unity?
Video class: Unity 2D Platformer for Complete Beginners - #6 CAMERA MOVEMENT 08m
Exercise: What setup is required for a door to trigger the camera to move between rooms?

Video class: Unity 2D Platformer for Complete Beginners - #7 HEALTH SYSTEM 23m
Exercise: In the health system, why is the player's current health clamped using Mathf.Clamp with a minimum of 0 and a maximum of startingHealth?
Video class: Unity 2D Platformer for Complete Beginners - #8 IFRAMES 08m
Video class: Unity 2D Platformer for Complete Beginners - #9 TRAPS 41m
Exercise: In Unity, what must be enabled on a trap’s BoxCollider2D so the damage logic using OnTriggerEnter2D works correctly?

Video class: Unity 2D Platformer for Complete Beginners - #10 ENEMIES 52m
Exercise: Why is the Hurt animation set to transition from Any State in the animator?
Video class: Unity 2D Platformer for Complete Beginners - #11 AUDIO 19m
Exercise: What is the correct way to prevent background music from restarting when loading a new scene, while avoiding duplicate SoundManager objects?
Video class: Unity 2D Platformer for Complete Beginners - #12 ADVANCED JUMPING 14m
Exercise: How is adjustable jump height implemented so a short key press makes a smaller hop?

Video class: Unity 2D Platformer for Complete Beginners - #13 CHECKPOINTS 14m
Exercise: When activating a checkpoint, which collider type should be disabled in the trigger code for a 2D platformer?
Video class: Unity 2D Platformer for Complete Beginners - #14 GAME OVER 21m
Exercise: In the UI Manager restart method, what value is used to reload the current level?
Video class: Unity 2D Platformer for Complete Beginners - #15 PAUSE MENU 21m
Exercise: Which Unity setting is changed to actually pause and unpause the 2D platformer gameplay when the pause menu is shown?

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Free online courses on 2D Game Development

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Explore free online 2D game development courses with certificates and learn to create engaging games from scratch. Build practical skills in game design, programming, animation, sprites, physics, level creation, and popular engines. Study at your own pace, strengthen your portfolio, and start your journey toward a career in 2D game development.