Another addingtive game

I have some vague memory of something like this a long time ago, I'm definitely going have to check this out in class tomorrow, thank you for the link, it'll help stave off the inevitable boredom.

 

A hint for level 10:

Spoiler

Go straight outside the blocks and turn right...

 

And I'm also stuck on 11.

 

Another hint for 11, then:

Spoiler

Hit the bulb closest to the laser pointer first, then go diagonal.