Level 17- Chain the two embryos to the one closest. Send it out, and when the one is almost at 0, cut off another so the embroy is refilled. This will make the line go long
To win the med. challange, just use stars, whenever you get them, on large items. The katana and club are to be kept on the sides, and the crossbow, battleaxe, regular axe, and sword should be gotton rid of. anything else- try to make as compact as possible
My strategy is finish all the newbie levels, then do the first row of the second level. Skip ahead to the final level, and slowly go down from hardest to easiest.
 "Running jumper"){kind=icon}
 "Tentacle Wars"){kind=icon}
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 "The Irritating Button 3"){kind=icon}
 "Ninja Platformer Demo"){kind=icon}
 "This Game SUCKS"){kind=icon}
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 "Ye Olde SpaceShip Game"){kind=icon}
 "Flash Freekicks"){kind=icon}
 "Hardcore Rectangle Parkour"){kind=icon}
 "Help the Hero"){kind=icon}
 "Picma Squared"){kind=icon}
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 "Orbital Onslaught"){kind=icon}
 "Fade"){kind=icon}
 "My Little Army"){kind=icon}