On my first try I left 1 enemy behind in the first galaxy and moved on to the second, where I died. After that I loaded my save game, but couldn't complete any mission nor did I have an objective marker.
Yeh only 1 boss... , but for the people complaining about the shootorials: I did my best in making an other game by adding things like specials and different bullet types and enemies type. I would like to add some other things but I just don't know how to do it, I still have to learn allot I know and I really try to find things out on my own, but I really need an tutorial. So, if anyone has a nice tutorial on how to make games other than the shootorial say it, And the artwork IS NOT STOLEN, I made it myself (in spore, about that part you're right)
This game isn't very good indeed (I would make the ship faster), but for an first game it's good. I'm also making a game and I think this is much better. 4/5 because it's your first game
Some things that needs to be fixed:
No enemies on the upper lane
To much enemies, it's quite impossible to come trough
It's possible to move out of the screen (I got lost :D)
Nice start!