New Twiddle

components.my-component\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';

export default class extends Component {
  @action
  init(element){
  	element.style.backgroundColor = "lightblue";
  };
  
  @action
  componentRefreshed(element){
		element.style.backgroundColor = "red";
  }
}

controllers.application\.js

import Controller from '@ember/controller';
import { tracked } from "@glimmer/tracking";
import { action } from '@ember/object';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
	@tracked shrimpsQuality = 'good';

	@action
	updateShrimpsQuality(event){
    this.shrimpsQuality = event.target.value;
  }
}

templates.application\.hbs

Application template: <input type="text" value={{this.shrimpsQuality}} {{on "change" this.updateShrimpsQuality}}/>

<br><br>
Shrimps quality: {{this.shrimpsQuality}}
<br><br>

<MyComponent @shrimpsQuality={{this.shrimpsQuality}} />

templates.components.my-component\.hbs

<div {{did-insert this.init}} {{did-update this.componentRefreshed @shrimpsQuality}}>
  This is my component
  <br>
  Shrimps quality: {{@shrimpsQuality}}
</div>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
  	"@ember/render-modifiers": "1.0.2",
    "@glimmer/component": "1.0.0"
  }
}