Those looking for hard badge. You can use cheats on bonus levels. You only need them to be off o get S or A ranks to unlock them. Also try getting A on the first bonus levels which is pretty easy with upgrades. Lance is both the fastest shooter and the fastest character. Use him to take everything out ASAP. Some of the bonus levels will give you a lot of coins to upgrade quickly. Go for sub recharge. First. Then take whatever you want but I recommend shooting rate. Then it will be really easy. Don't take life since you won't get allowed to get more than 1 or 2 times for S-rank so it's pointless. Also there is in in-game medal for clearing it without upgrading health.
 "Epic Battle Fantasy 4"){kind=icon}
 "The Grinns Tale"){kind=icon}
 "Jumper"){kind=icon}
 "The I of It"){kind=icon}
 "Bullet Heaven"){kind=icon}
 "Dolphin Olympics 2"){kind=icon}
 "Dungeon Defender"){kind=icon}
 "Adventure Story"){kind=icon}
 "NoNoSparks: Genesis"){kind=icon}
 "The Adventures of Red"){kind=icon}
 "VortexWars2"){kind=icon}
 "Not Another Pointless Flash Game Button In Which The Button Goes In Another Rambling Adventure Talking Unimportant But Interesting Facts In Which Kongregate Users Rate 1/5 And Don't Play The Stupid Game Yet They Still Wonder What The Game Is About Only Be"){kind=icon}
 "Supersonic Speeders"){kind=icon}
 "Tasty Planet: DinoTime"){kind=icon}