Woohoo, I beat it without needing a walkthrough! :D (Sadly, that's an actual accomplishment for me.) Got a little stuck a couple of times, but managed to figure it out.
To beat "Go Back", go back to the previous room. There's a key in the middle of the floor. Picking it up opens a door in the "go back" room. To beat "Control Freak", press CTRL several times. This creates steps that you can use to get to the door. (Just be careful not to press CTRL at the same time as you jump.)
I have the worst luck XD Very first level: All the suspects were left-handed, all were convicted felons. My clues? "The murderer is a convicted felon." "The murderer is left-handed." "Time's up, who's the murderer?" ._.
Past me SUCKS. I played this game ages ago and got 29 achievements. Twenty. Nine. I had to start completely over to get the 30th. T_T
I mean, not that the game isn't fun, it's just that it takes so long to get the achievements.
 "Saving the Company"){kind=icon}
 "ClueSweeper"){kind=icon}
 "Cube Escape: Case 23"){kind=icon}
 "mini Tower Defence (mTD)"){kind=icon}
 "Upgrade Complete 2"){kind=icon}
 "Treadmillasaurus Rex"){kind=icon}