I really liked this game! I don't have a problem with a pattern boss at the end, but I would have preferred a boss you fight instead of having to avoid. 4/5. :)
The main problem with this game is that it's inconsistent. Sometimes a specific design will work just fine, sometimes a support will break but it will still hold, and sometimes it will fail catastrophically. I once ran the exact same design four times, and it worked perfectly and beat the level the last time.
The game itself is fantastic, but since this is actually nothing but an ad for the for-pay full version on a free game web site, I give it 1/5, if only because there's no zero button.
I liked it a lot, though I agree with a lot of people here that it kind of sucks that you can accidentally make it impossible to finish the game by killing the homeless guy. 4/5.
It's awesome to finally see a sniper game that doesn't use stick figures, but shooting the wrong people and failing on purpose is half the reason people play these games. Just fading away instead of playing an animation for their death is incredibly unsatisfying.