Here the thing. Started out as a 5/5. Lagg, minus 1 star. Then hard to control minus star. Lastly the enemies were placed so you had to be a physic to avoid them. You would build up your momentum then bam an enemy you need to have lightening fast reflexes to predict it. 2/5
Level 10: One ducking on the very edge of the top platform. Then on the smaller highest platform put to ducking ones on each side. The one on the left of the short should be hanging off. release a running boxmen on the smaller were you put 2 ducking ones. Then run like hell to the box.
Level 11: Put one on each platform and jump down to the electric box but in mid jump turn right and let one go then go down to the electric box and power it yourself.
Level 8: just wait till he gets about 6 spike blocks on the left down and press shift.
Level 10: Put one on the highest platform on the left on the edge. Then on the other highest platform put one on each edge get to the right and release a running boxmen
Easy way to get all acheivments: spiral around till your tank is fully leveled. After you beat the boss just go out in a straight line till you find all the mini bosses.
 "Four Second Frenzy"){kind=icon}
 "The Fancy Pants Adventures"){kind=icon}
 "Platform Journey"){kind=icon}
 "Death vs. Monstars"){kind=icon}
 "Use Boxmen"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Bunny Invasion 2"){kind=icon}
 "Bubble Tanks 2"){kind=icon}
 "Nano War"){kind=icon}
 "GemCraft chapter 0"){kind=icon}
 "Little Wheel"){kind=icon}