It's not an easy game! It's also very short (technically infinite but after 4 levels the patterns just start looping) so I'm glad it's enough of a challenge to keep you playing for 30 tries! I hope you make it to the next round :)
The speed boost doesn't kill enemies but it does make you invincible for a moment, so in a tight spot you can use it to dash past them. I hope that's enough to at least help save your day :)