As per Scratch 2.0, shift clicking the "Green Flag" button should toggle "turbo mode". @carljbowman any thoughts on design / layout given the new position of the flag / stop buttons?
Functionality resolved in #334 (HT @fsih) we just need to figure out the visual indication piece of the puzzle now.
/cc @carljbowman
Thanks for the heads up. Chatted with @fsih and @rschamp yesterday.
I'll be considering this as apart of https://github.com/LLK/scratch-gui/issues/219
This does not include Animation states. See more robust outline below for animations


Opacity: 100%
Size: 100%
Animating: No
Animation Speed: N/A
Background: No
Include Turbo Text: No

Opacity: 100%
Size: 120%
Animating: No
Animation Speed: N/A
Background: No
Include Turbo Text: No
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Animating: Yes
Animation Speed: Slower
Background: Yes
Include Turbo Text: No
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
Animating: Yes
Animation Speed: Slower
Background: Yes
Include Turbo Text: No
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Animating: Yes
Animation Speed: Faster
Background: Yes
Include Turbo Text: Yes
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
Animating: Yes
Animation Speed: Faster
Background: Yes
Include Turbo Text: Yes

Opacity: 50%
Size: 100%

Opacity: 50%
Size: 120%
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
@paulkaplan - Here are those 'Turbo Mode' specs
font-size: .625rem;
color: $control-primary or color:#FFAB19
Bolt icon: turbo-bolt-icon.svg.zip

So the turbo mode indicator and design updates are done, but not the animation. I'm a bit concerned about the performance implications of the animation, in general the idea of running another animation specifically while the project is executing seems like it might be a bad idea.
so let's split it off into a separate issue.
Most helpful comment
Green Flag / Stop States Matrix
This does not include Animation states. See more robust outline below for animations
Green Flag States
Green Flag - Resting
Opacity: 100%
Size: 100%
Animating: No
Animation Speed: N/A
Background: No
Include Turbo Text: No
Green Flag - Resting:Hover
Opacity: 100%
Size: 120%
Animating: No
Animation Speed: N/A
Background: No
Include Turbo Text: No
Green Flag - Executing
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Animating: Yes
Animation Speed: Slower
Background: Yes
Include Turbo Text: No
Green Flag - Executing:Hover
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
Animating: Yes
Animation Speed: Slower
Background: Yes
Include Turbo Text: No
Green Flag - Executing:Turbo
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Animating: Yes
Animation Speed: Faster
Background: Yes
Include Turbo Text: Yes
Green Flag - Executing:Turbo:Hover
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
Animating: Yes
Animation Speed: Faster
Background: Yes
Include Turbo Text: Yes
Stop States
Stop - Resting
Opacity: 50%
Size: 100%
Stop - Resting:Hover
Opacity: 50%
Size: 120%
Stop - Executing
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Stop - Executing:Hover
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%
Stop - Executing:Turbo
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 100%
Stop - Executing:Turbo:Hover
_Timing of animation is temporary, but simply demonstrates that the Turbo should animate faster._

Opacity: 100%
Size: 120%