There are a couple things that could/should be better explained. Like, something I didn't know at the start was that you could continue making exp on guns you've already done's game mode, or field strip, just at 10%. So I was worried that the only way to unlock new guns was either money, or coming back for the daily streak. Another useful thing for faster times is turning off Autofocus, without which I assume getting some of these fast times is impossible. I guess that one's more of a tip than a complaint, really.
So I think I accidentally won. I chose the Creep Magnet guy, and after a few launches, the nerd suddenly was hitting creeps in every ground smash and picking up speed and launching from the sky like crazy. It took about 10 minutes for me to hit the ground, after getting something like 2 mil
One thing I'd like to see is a draw under-type of option. So, for example, line 3 would never overlap lines on a higher than it.
Other than that, though, I seriously use this probably at least once a week for random cool designs. :P
 "Gun Disassembly"){kind=icon}
 "Berzerk Ball 2"){kind=icon}
 "JumpingLine"){kind=icon}
 "Refraction"){kind=icon}
 "Rotatix"){kind=icon}
 "Level Up!"){kind=icon}