Level 19: You pretty much have to have heaps of copies of yourself on top of you. Sorta like a tower so your stuck estimating each jump since the clones just go through the barrier. It takes like forever though.
Level 20: Just keep jumping across and press space. Repeat like 5000 times and you'll eventually get carried along.
Hope it helps.
All I pretty much did was upgrade my lazer and lightning on both arms to finish the game. I ended up just adding a few on strength on both arms and a couple of speed.
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