Hi @princeofmars!
Okay, so you put it up for feedback presumably? I know you said you are a "total amateur" but if you put it up here, people will play it and give you constructive criticisms. I don't cut slack for "beginner" or "expert dev" I just give my feedback the same across the board. (seem my
crits on Sine Mora)

So here's some thoughts on your game.
1. The art is good! I like it a lot, it has a good style... but...
2. The art is frequently unreadable. Meaning it's tough to distinguish background from enemies from bullets. This is bad!
But the good news is this is also fixeable. For starters, I'd put a thin dark outline (not black) but dark around your bright bullets as they are lost in the clouds (the blue bullets and some orange ones).
Basically check all art for readability. Can you easily tell what will kill the player? Can you tell what to dodge? Can you tell what to shoot? You may need to take screens and check with other players for some help.
Also a lot of enemies are dark and your pretty background buildings are dark too, and it's hard to see things.
3. I couldn't play with my xbox 360 controller or with keyboard controls. I'd like those options and I believe Construct 2 makes that pretty easy. Ask me if you need help.
4. Your player shots should show a graphical 'hit' or flash or small sparks or something when they are doing damage/hitting things. Some feedback when the player shots hits things is good. I know the enemies flash, but more than that would help.
5. Your 'popcorn' enemies take probably too much damage. It makes the game feel like a slog and your player feels underpowered.
6. Like someone on the game page-comments mentioned, a checkpoint for the second section would be good.
7. The shield controls are confusing. Sometimes it says press "Ctrl" to use. Sometimes I have to use my mouse to click the 'S'. Seems like a bug.
8. The music does not pause when you pause the game, but it should.
9. You player ship is rather large and makes the game feel claustrophobic. Maybe drop the scale down by half? Or so?
Keep up the good work!