It's fun, but my computer couldn't play it properly even on efficiency mode when there started being large number of enemy tanks and enemy fire on screen... it was taking up to and over 50% of my processor (dual-core 3.1 Ghz) so clearly something needs to be cleaned up so it runs a little better.
I gave it a 3/5 only because it needs some serious work such as you need to make it so you can crash when you run into ships and when you go into the water and maybe make the control a little easier (like maybe use the mouse to change directions, but I do really like the idea and hope that it can be fixed up so that it is more playable.
Overall fun, but could use a damage upgrade, a recharge rate upgrade, and more upgrades for the mini-coil. I also felt like no level really utilized the full 7 chains very much and I probably could have easily made it through the game without the second upgrade of it (a level that was just massive amounts of infantry would make me happier).
i also love how the tempo off the song almost never matches with the scroll rate of the highway, so notes that would be "on beat" are often in weird spots compared to the highway's tempo markers.
if you are going to rip off Guitar Hero and RockBand at least add some of the good features such as in when hitting a yellow, you can be holding a red and/or a green at the same time... i found this really annoying that i would lose a streak because i was used to doing this.
it was kinda easy... and for the spreader upgrade it says that it increases spread and total number of shots which is true until you get 3 shots. Please add something saying it maxes at three because that bugged me.
 "Frozen Islands"){kind=icon}
 "Idleplex"){kind=icon}
 "Give Up"){kind=icon}
 "Relive Your Life"){kind=icon}
 "Bubble Tanks 3"){kind=icon}
 "Jets Of War"){kind=icon}
 "Car game don't drink"){kind=icon}
 "No Time To Explain"){kind=icon}
 "Tesla Death Ray"){kind=icon}
 "Santa Rockstar: Metal Xmas 3"){kind=icon}
 "Pixel Shooter"){kind=icon}
 "Spin the World"){kind=icon}