it cant be a impossible badge because last level is kinda lucky base: i just beat because there was no "rain of lasers" pattern one time.. i could actually aced that time if i wouldn't have make any mistakes.
Tips: what @Supreme Ninja said its correct, to the people that still can't beat the last lvl: Rockets: make an U... take some time on the sides.. then when you go to the other side going throu the bottom the missiles are already gone.
and the most dificult "laser Rain": go to the right bottom and hold SHIFT. seriously DO IT. when the wave turn arround and go to the right, still safe and follow the wave until its impossible to continue without take any damage.. when the time come, take some hits and jump to a more central space.. you will be hit but will be ok.
General TIP lat level: ALWAYS go to right between the shots
just played until lvl 28 when i get all the badges... the Epic war Saga disappointed me i don't want to play the SAME quest for like 25 times tomove on.
 "Reactance")
 "Bloons TD 5")
 "Epic War Saga")
 "Stick Hero Idle 2")
 "Agony: The Portal")
 "Pinch Hitter 2")
 "Notessimo")
 "Micro Olympics on Mars"){kind=icon}
 "GeoSketch")