DOTS_Pong/DOTS_Pong/Assets/Scripts/Systems/IncreaseVelocityOverTimeSystem.cs

using Unity.Entities;
using Unity.Jobs;
using Unity.Mathematics;
using Unity.Physics;

[AlwaysSynchronizeSystem]
public class IncreaseVelocityOverTimeSystem : JobComponentSystem
{
	protected override JobHandle OnUpdate(JobHandle inputDeps)
	{
		float deltaTime = Time.DeltaTime;

		Entities.ForEach((ref PhysicsVelocity vel, in SpeedIncreaseOverTimeData data) =>
		{
			float2 modifier = new float2(data.increasePerSecond * deltaTime);

			float2 newVel = vel.Linear.xy;
			newVel += math.lerp(-modifier, modifier, math.sign(newVel));
			vel.Linear.xy = newVel;
		}).Run();

		return default;
	}
}