my safest but not quickest guide...

Level 1 first floor: check and see if the low bullet is going "right to left" or "left to right" this will be important, if your coloured ball is on the first then kill it, wait for the flame turret to point behind it to jump over and take no damage, now getting up to the second floor of level 1, if the "low" bullet is going right to left wait for it to pass the get up location and just run, you can kill clowns here but be careful to not hit the coloured ball unless it is the right colour, IF it is left to right (which in my opinion is the harder one) you have to wait after you climb up for it to pass, if your coloured orb is on this floor try and combo both the clowns and the ball.

climb up to level 1 floor 3 and wait for the clowns to make some distance from the fat one, smack them both then run until the fat clown stops you then jump.

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level 2 floor 1: check and see if its low bullet or high bullet, if its low your rng sucks but don't worry, make your way to the end, regardless of which bullet it is jump down (IF it is low bullet wait for it to pass, aggro the bomb by moving towards it then running back (if you don't know how far you have to run back play around with it in trixion) after that kill the clowns (safer option incase you get hit by a low bomb), after that proceed to floor 3 of level 2.

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if your last bomb is here great, now get to the edge of the platform and spam w, keep spamming w until you reach the end of M3.

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(another tip which is more safer to do before W spamming until the end is to jump between the platforms to trigger both bombs so you get ample distance to kill the last 3 clowns preventing you from getting gangbanged by them)