In speedCatch, the only way to lose is to explode by touching the center wall. It would be easy if this spiked hazard didn't move as you collected pellets. But be reassured: it moves towards your enemy. As long as this enemy don't take more pellets than you!
You'll have to avoid blue circles, too. They won't harm you, but they will slow down you for a bit - which can harm you. Badly.
If you don't have any available friend, just ask the AI to play against you: you can chose its skill level, from the 0% "Blind man" to 100% "Don't even try".