Great game, but it is easier to gain 100% on every song when you use keyboard.
Easy song buttons: osx, paz
standard song buttons: osx(+space) or paz(+space)
crazy song buttons: (number 0)odc+space
With these buttons you can beat the game a lot easier :-)
Super game! I made hard badge (very hard) in 5 days. In first day I had collected 100$, in second11k$, in last day I had maxed: Band, Launcher, E-rocket, left and right rocket on 5lv, parachute lv1.
This is REALLY good trick, in which you can upgrade your characters without equipping a weapon! To do it just buy some equipment , click on it , go with that weapon to options screen and let it go at the centre of screen, check your stats to see that they changed!
This is very easy game to make 80 points, but it is long game.I have done this game in............... 2 minutes!with all achievements! If you havent got time or just having trouble with achievements, just send to me a message and you will get a easy walktrough.
 "Dawn of the Dragons")
 "I hate the button")
 "SCGMD4")
 "Super Crazy Guitar Maniac Deluxe 3")
 "Effing Worms - Xmas")
 "Streamline"){kind=icon}
 "Hordes and Lords")
 "Guitar Geek")
 "Badge Master")
 "DJManiax"){kind=icon}
 "Hedgehog Launch")
 "Sonny")
 "Gibbets 3")