Okay, you can automatically win a level without much difficulty: After PAUSING the game (while you're in that sertain level) press AND HOLD L1. (While still holding) Press O, <-, O, ->, O, [](square), <-, <-, ->, R2. You will soon hear a sort of "ding!" and a second later, you're at the end-of-level-screen.
Enjoy!
More tricks, tips and cheats for this game are right here - Portal Runner cheats
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