There are some typos you'll want to address. When switching to the next scene, even though I lost a life immediately, the level kept going, infinite scrolling. Might be worth having a faster transition across scenes after you beat them?
This is great, the text is a little annoying though, might want to change the font or make it bold? More enemies! And also maybe add an individual coin counter each level, or add it as a running score perhaps? They don't feel like they do anything at the moment.
Nice work on this, would be good to mention you can also click to shoot in the help menu. Adding the high score area would be worth doing for next version. Increasing difficulty would also be a good area to look into.
Will try to give as much feedback as possible.
Overall it's pretty nifty, I like the new artwork for the asteroids and explosions.
The firing feels a little slow for me, maybe it's just me, you could try changing it for a charged shot, that releases a wider projectile after it's held down that can destroy multiple enemies. then swap the normal shooting for a more instantaneous single shot that is faster.
You have a couple of collision things going on with the boulders, they will sometimes collide and bounce off the screen. With the way you have the turrets working they lock on and never stop firing at it, never really being able to kill it.
Try making it so they die upon leaving a region perhaps?
You could also have it so build mode is cancelled when you click.
Gotta run, will chat on FB if needed.
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I didn't mean to xD it just happened... :P thank you :D