Yep, just like the title suggests i found it to be very sucky.
First of all, the earth/blue ball is centered down on the screen as opposed to the middle. This leads to the player having no real overview of the situation. You'll have to change the angle in order to see the incoming meteors and when you do, you better stay on the spot until you've hit them. If you don't stay on the spot, the fired shot will miss the target for some mystical reason that i can't seem to comprehend. If you wait however, there's another one incoming, and it will hit. Many times you'll see how close it is but you can't do anything about it at this point.
The shots themselves move way too slow, drain way too fast and appear on places so far away that it won't even be worth taking them many times. Then you have them divided; one giving you regular ammo, the other giving you shotgun. The thing about it however is that the shotgun really sucks since many times you'll just need to hit one enemy. And even if you don't, it's worthless because you have to stay in the spot anyway because like i said, if you change angle then the bullets vanish...
might aswell stay there, calmly aim and fire 2-3 single bullets and destroy the asteroids. Since ammo is so scarce i see no reason to get the shotgun at all.
on top of all this, you'd have the problem with running into the shotgun while rotating. The last thing you need when you're low on ammo is a crappy weapon that will drain it 3 times faster...
I'd suggest dedicating some more days if you want to create a game in the future. Maybe then it won't fail this bad...?