Nice game, the candy explosion are great and we don't even talk about our spaceship's explosion, it's really well made ! :)
The enemy patterns are predictable, they are also clearly visible by contrasting their colors with the background, good job !
I would leave just a little game design tip (though I'm not an expert at all) : Since we need to keep the spacebar pressed in order to shoot, and there is no penalty when shooting indefinitely, I suggest you to put an option to auto-shoot without the need of pressing anything. It's quite convenient for disabled players for example.