HaxeFlixel/flixel

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Free, cross-platform 2D game engine powered by Haxe and OpenFL

Stars: 2.2k
Forks: 522
Open beginner issues: 0
Indexed issues: 255
Avg merge: 34m
Merged PRs (30d): 1

Dominant language: Haxe
License: MIT
Last GitHub push: Aug 23, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

255 open issues indexed

Initial State is created before final resizeGame() call Open

Structure

Difficulty 3/5 1-2 days Newbie friendliness 68/100

HaxeFlixel/flixel#3658 · 2 comments · Opened Sep 4, 2026
Window movement limited to 10 FPS after focus loss Open

Breaking Change Structure

Difficulty 4/5 3-5 days Newbie friendliness 48/100

HaxeFlixel/flixel#3651 · 2 comments · Opened Aug 12, 2026
FlxG.overlap doesn't handle FlxBasics that are not FlxObjects or FlxGroups Open

Bug Collisions

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

HaxeFlixel/flixel#3650 · Opened Aug 11, 2026
FlxG.keys.justPressed returns true at odd times Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

HaxeFlixel/flixel#3641 · 1 reaction · Opened Jul 28, 2026
Remove FlxGraphic Open

Animation/Frames Assets Breaking Change Structure

Difficulty 5/5 Over a week Newbie friendliness 30/100

HaxeFlixel/flixel#3635 · 2 comments · 2 reactions · Opened Jul 16, 2026
FLX_TRACK_POOLS not working on Hashlink Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

HaxeFlixel/flixel#3624 · 4 comments · Opened Jul 9, 2026
Better alternative to FlxG.bitmap.whitePixel Open

Assets New Feature Structure

Difficulty 5/5 Over a week Newbie friendliness 35/100

HaxeFlixel/flixel#3620 · 1 reaction · Opened Jun 24, 2026
Check out Flixel-Switch fork Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3615 · Opened Jun 15, 2026
Call onComplete if _sound is null Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

HaxeFlixel/flixel#3614 · 8 comments · Opened Jun 11, 2026
Groups and Containers: add defaultSplice bool, and change remove's splice arg to forceSplice Open

Improvement Performance/Memory Structure

Difficulty 4/5 3-5 days Newbie friendliness 48/100

HaxeFlixel/flixel#3613 · Opened Jun 10, 2026
Groups and Containers: Don't bubble kill, revive, exists, active, visible, and alive down to members Open

Improvement Structure

Difficulty 5/5 Over a week Newbie friendliness 35/100

HaxeFlixel/flixel#3612 · Opened Jun 10, 2026
Use @:structInit in FlxTextFormatRange and FlxTextFormatMarkerPair Open

Improvement New Feature Text

Difficulty 3/5 1-2 days Newbie friendliness 48/100

HaxeFlixel/flixel#3606 · 2 comments · Opened May 31, 2026
Put points in FlxCamera Open

Camera Improvement Performance/Memory

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

HaxeFlixel/flixel#3599 · 1 comment · Opened May 16, 2026
Introduce an intermediate visual class Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3596 · 6 comments · 3 reactions · Opened May 2, 2026
FlxG.bitmap: Add null-safety Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

HaxeFlixel/flixel#3591 · Opened Apr 12, 2026
Sound debug window Open

Assets FlxDebugger New Feature Sound

Difficulty 5/5 Over a week Newbie friendliness 35/100

HaxeFlixel/flixel#3585 · 2 comments · Opened Apr 6, 2026
`sprite.dirty` always true on renderTile Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

HaxeFlixel/flixel#3584 · Opened Apr 3, 2026
error when compiling to android Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

HaxeFlixel/flixel#3583 · 1 comment · Opened Apr 3, 2026
FlxG.bitmap.exists Open

Assets Easy Change New Feature

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

HaxeFlixel/flixel#3579 · Opened Mar 24, 2026
FlxGroup: add type param to add method Open

Breaking Change Improvement Structure

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3576 · Opened Mar 18, 2026
Persist Precaching Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3574 · 1 comment · Opened Mar 17, 2026
Abstract (and unify?) filters and shaders Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3566 · 11 comments · Opened Mar 10, 2026
Delay destruction of graphics by a small amount of time Open

Assets New Feature Performance/Memory

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3565 · 2 comments · 2 reactions · Opened Mar 9, 2026
Improve Debug features Open

FlxDebugger

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3564 · Opened Mar 7, 2026
Overhaul to CI Open

CI

Difficulty 5/5 Over a week Newbie friendliness 20/100

HaxeFlixel/flixel#3562 · Opened Feb 23, 2026
Use a float to represent game ticks Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3561 · 2 comments · 1 reaction · Opened Feb 22, 2026
Consider replacing HaxeFlixel’s built-in collision/physics system with a Phaser Arcade–based alternative for better performance and compatibility Open

Collisions

Difficulty 5/5 Over a week Newbie friendliness 20/100

HaxeFlixel/flixel#3557 · 3 comments · Opened Feb 17, 2026
Split parts of the draw method Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3552 · 1 comment · Opened Feb 3, 2026
FlxTextBitmap: Update line width caching Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

HaxeFlixel/flixel#3550 · Opened Jan 14, 2026
Transparent camera causes unnecessary draw calls Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

HaxeFlixel/flixel#3549 · 2 comments · Opened Jan 14, 2026
FlxSound and FlxG.sound: Further rework load methods Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3547 · 2 comments · Opened Jan 8, 2026
Optimize matrix recomputation Open

Collisions

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3544 · 1 comment · 1 reaction · Opened Jan 6, 2026
Abstract BitmapData to allow ram dumping Open

Assets Rendering Structure

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3540 · 8 comments · Opened Dec 26, 2025
Figure out starting tile Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

HaxeFlixel/flixel#3537 · Opened Dec 20, 2025
FlxFrame.flipX/Y doesn't do anything Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

HaxeFlixel/flixel#3536 · Opened Dec 16, 2025
Use matrices in `transformWorldToPixels` Open

Improvement Rendering

Difficulty 5/5 Over a week Newbie friendliness 30/100

HaxeFlixel/flixel#3535 · Opened Dec 15, 2025
Create RenderFrontEnd Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3527 · Opened Dec 2, 2025
Switch Pro Controller inputs are gibberish Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

HaxeFlixel/flixel#3523 · 1 comment · Opened Nov 21, 2025
FlxSubState.onFocus and FlxSubState.onFocusLost don't get called Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

HaxeFlixel/flixel#3520 · Opened Nov 15, 2025
Honor alpha channel in most colors Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3513 · 1 reaction · Opened Oct 12, 2025
Custom ScaleMode class: can't modify FlxG.width / FlxG.height Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

HaxeFlixel/flixel#3510 · 3 comments · Opened Oct 11, 2025
Create Rendering "unit" tests Open

CI

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3507 · Opened Oct 7, 2025
Deprecate RelativeScaleMode Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

HaxeFlixel/flixel#3496 · 1 comment · Opened Sep 28, 2025
Debug bounding boxes offset when zoom changes (renderBlit) Open

Bug FlxDebugger Rendering

Difficulty 4/5 3-5 days Newbie friendliness 35/100

HaxeFlixel/flixel#3494 · Opened Sep 25, 2025
Remove signal.destroy Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

HaxeFlixel/flixel#3486 · Opened Sep 17, 2025
Proposal: Replace BLITTING with DRAW_TILES everywhere Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

HaxeFlixel/flixel#3468 · 3 reactions · Opened Aug 29, 2025
FlxCollision.pixelPerfectCheck() doesn't work when one of the sprites has a custom origin Open

Bug Collisions

Difficulty 3/5 1-2 days Newbie friendliness 42/100

HaxeFlixel/flixel#3465 · Opened Aug 25, 2025
Camera shaders don't update after resizing the window Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

HaxeFlixel/flixel#3463 · Opened Aug 17, 2025
Replace Code Climate Open

CI Github

Difficulty 2/5 1-3 hours Newbie friendliness 66/100

HaxeFlixel/flixel#3456 · 1 comment · Opened Aug 2, 2025
CollisionFrontEnd Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

HaxeFlixel/flixel#3430 · 2 comments · Opened May 6, 2025

HaxeFlixel/flixel

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