Well, I did it in 6 days, and in Free Mode, I just made it 13 minutes 80k ft and earned 3 million (still have over 2 million left after buying everything) on day 3
Ok, some more problems, you pratically have to get ALL the items on level 6, which is practically impossible as the AI is bound get get at least 3. As I said before, the time challenge for level 5 is broken. And the time challenge for level 6 is cheap. Fun game but for the challenges, the last couple are pure luck.
You can basically skip all the levels, go to the last one, and just use all your bombs when a good number of enemies are on the screen, getting a great amount of points for upgrades.
Also, the planet on the bottom of level 5 of space has WAY too strong of a gravitational pull, I manage to get literally 2cm away from the bottm, and I get pulled away from that dinky planet!
 "This is the Only Level"){kind=icon}
 "Multitask"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}
 "Fragger"){kind=icon}
 "Polygonal Fury"){kind=icon}
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 "Drift Runners"){kind=icon}
 "Avoid the Laser 2"){kind=icon}
 "ClickRace"){kind=icon}
 "The Riddle Engine 2"){kind=icon}
 "Detox"){kind=icon}
 "Super Stacker 2"){kind=icon}
 "Psy"){kind=icon}
 "Farragomate"){kind=icon}
 "Psychological Testing"){kind=icon}
 "Ragdoll Cannon: Remake"){kind=icon}
 "PingBall"){kind=icon}