Textured Fireworks

Looks especially good on a pixel res game. Make the explosion_value higher to see instant results.

Shader code

shader_type canvas_item;

uniform float explosion_value = 0.0;
uniform float particle_size = 0.2;
uniform float number_of_particles = 50.0;

uniform float expansion_multiplier = 1.0;
uniform float fall_multiplier = 1.0;

uniform float falloff_point = 2.0;
uniform float falloff_spread = 0.5;

float random (vec2 uv) {
	return fract(sin(dot(uv.xy,
		vec2(12.9898,78.233))) * 43758.5453123);
}

float is_particle(in vec2 expanded_uv, in float expand_value) {
	float random_displacement = 0.0;
	expanded_uv.y += -random(round(expanded_uv * number_of_particles)) * expand_value * 0.2;
	expanded_uv.x += random(round(expanded_uv * (number_of_particles + 1.0))) * expand_value * 0.1;
	float is_circle = length((round(expanded_uv * number_of_particles)) - (expanded_uv * number_of_particles));
	return is_circle;
}

void fragment() {
	float expand_value = max(0.001, explosion_value * expansion_multiplier);
	float clamped_explosion_value = max(0.1, explosion_value);
	vec2 centered_uv = UV - vec2(0.5);
	vec2 expanded_uv = (centered_uv / (expand_value));

	expanded_uv.y -= (clamped_explosion_value * -cos(centered_uv.x) * fall_multiplier);
	expanded_uv.y -= clamped_explosion_value * fall_multiplier;
	vec4 pixel_color = texture(TEXTURE, expanded_uv + 0.5);
	float multiplier = 50.0;

	float new_particle_size = min(particle_size,
	(falloff_point - clamped_explosion_value) - (random(round(expanded_uv * number_of_particles)) * expand_value * falloff_spread));
	COLOR = (is_particle(expanded_uv, clamped_explosion_value) > new_particle_size ? vec4(0.0) : pixel_color);
}

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