To beat level 30 get some goo and then make them go in a infinity loop of falling once that has happened place a portal at the top side and then go on the trampoline and try aiming for the bottem side where the door is near after that happens use a other portal at the goo and go down.
Tips: Remember placeing worm holes from across each other will inceasespeed of ball while doing that select place to speed launch also plan ahead useing gravity and the dirrceion the blackhole was entered wthe other black hole is oppisite.
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