--- key: mechanic/movement-platforming--t004 type: mechanic id: movement-platforming--t004 lang: en title: Momentum and speed preservation summary: >- The player accelerates, brakes and preserves momentum, trading fast traversal against precise trajectory changes. updatedAt: '2026-10-22' status: active url: 'https://gamemechanics.pro/en/knowledge/mechanic/movement-platforming--t004/' jsonUrl: >- https://gamemechanics.pro/api/v1/knowledge/en/mechanic/movement-platforming--t004.json markdownUrl: >- https://gamemechanics.pro/content/knowledge/en/mechanic/movement-platforming--t004.md aliases: - Momentum and speed retention tags: - Movement and platforming - Mechanics and variants sourceIds: - source-b8626268f7974a44 - source-ad5935e19b434514 - source-8b181715b5c89953 - source-52d22a0a24958997 sources: - id: source-b8626268f7974a44 title: 'Godot: 2D movement overview' url: 'https://docs.godotengine.org/en/stable/tutorials/2d/2d_movement.html' verifiedAt: null - id: source-ad5935e19b434514 title: 'Maddy Thorson: Celeste & TowerFall Physics' url: >- https://www.mattmakesgames.com/articles/celeste_and_towerfall_physics/index.html verifiedAt: null - id: source-8b181715b5c89953 title: 'Godot: CharacterBody3D' url: 'https://docs.godotengine.org/en/stable/classes/class_characterbody3d.html' verifiedAt: null - id: source-52d22a0a24958997 title: Sonic Mania url: 'https://store.steampowered.com/app/584400/' verifiedAt: null relations: [] placements: - catalogId: movement-platforming id: t004 title: Movement and platforming url: 'https://gamemechanics.pro/en/mechanics/movement-platforming/#t004' categoryIds: - mechanics supersededBy: [] attributes: preview: updatedAt: '2026-10-22' title: Momentum and speed retention description: >- The player accelerates, brakes and preserves momentum, trading fast traversal against precise trajectory changes. image: src: images/mechanics/priority-sonic-mania-00.webp width: 1440 height: 810 game: Sonic Mania sourceUrl: 'https://store.steampowered.com/app/584400/' originalUrl: >- https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/584400/ss_27efb8f61892a9bd732952c76dae9dd7ad1b6748.1920x1080.jpg?t=1785856230 credit: Christian Whitehead / Headcannon / PagodaWest Games / SEGA rights: >- Game imagery © its respective rights holders. Publisher-distributed Steam screenshot; all rights reserved. Excluded from MIT and CC BY 4.0. caption: Sonic crosses a curved section of terrain alt: Sonic crosses a curved section of terrain markers: - x: 51 'y': 74 label: Moving character - x: 33 'y': 71 label: The slope changes movement direction tips: - Test acceleration and braking on slopes as well as flat ground. examples: - title: Sonic Mania url: 'https://store.steampowered.com/app/584400/' endsAt: null provenance: >- Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant. license: CC-BY-4.0 codeLicense: MIT attribution: gamemechanics.pro contributors catalogKey: catalog/movement-platforming --- # Momentum and speed preservation id: movement-platforming--t004 type: mechanic key: mechanic/movement-platforming--t004 lang: en status: active url: https://gamemechanics.pro/en/knowledge/mechanic/movement-platforming--t004/ The player accelerates, brakes and preserves momentum, trading fast traversal against precise trajectory changes. ## At a glance ![Sonic crosses a curved section of terrain](https://gamemechanics.pro/images/mechanics/priority-sonic-mania-00.webp) [Sonic Mania](https://store.steampowered.com/app/584400/) · Game imagery © its respective rights holders. Publisher-distributed Steam screenshot; all rights reserved. Excluded from MIT and CC BY 4.0. 1. Moving character 2. The slope changes movement direction - Test acceleration and braking on slopes as well as flat ground. - [Sonic Mania](https://store.steampowered.com/app/584400/) ## How it works The player accelerates, brakes and preserves momentum, trading fast traversal against precise trajectory changes. ## Variants ### Mechanic variants - Gradual acceleration: speed builds over time and needs space before an obstacle. - Distinct braking: releasing input and pressing the opposite direction reduce speed differently. - Limited air control: a poor run-up cannot be fully corrected after takeoff. - Momentum transfer: a slope, moving support or booster affects the next jump. ## Design example A short route requires hard braking, while a wider detour preserves speed for a long gap. Prototype check: Record takeoff speed from different supports and check that jump distance follows the chosen momentum model. ## Context and limits Movement connects input, trajectory and accessible space. Players assess support, speed and remaining abilities, choose an action and correct their motion through feedback. These ten directions range from flat platforming to underwater movement. A first prototype needs only a few surfaces and one distinctive rule; the camera, collisions and return of control should explain success or failure. Godot documentation provides implementation examples, while the Celeste and TowerFall author describes one approach to movement and platforms; these choices are not mandatory in every engine. ## Connected materials ## Sources and provenance Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant. - [Godot: 2D movement overview](https://docs.godotengine.org/en/stable/tutorials/2d/2d_movement.html) (id: source-b8626268f7974a44) - [Maddy Thorson: Celeste & TowerFall Physics](https://www.mattmakesgames.com/articles/celeste_and_towerfall_physics/index.html) (id: source-ad5935e19b434514) - [Godot: CharacterBody3D](https://docs.godotengine.org/en/stable/classes/class_characterbody3d.html) (id: source-8b181715b5c89953) - [Sonic Mania](https://store.steampowered.com/app/584400/) (id: source-52d22a0a24958997) CC-BY-4.0 · gamemechanics.pro contributors