Positioning...
	Power-ups...
	Power-ups and take down enemie...

Remain in the middle and move up and down to take out as many enemies as possible. Leaving the middle will result in you becoming cornered. The toughest enemies usually appear through the middle.

Try to collect all the power-ups that appear, especially the hearts, shields, and time slowing varieties.

Attempt to gather all the power-ups that appear, specifically the hearts, guards, and time slowing ranges. Stay in the center and go up and down to secure as numerous enemies as possible. Leaving the middle will certainly lead to you ending up being cornered. The most difficult enemies generally appear with the middle.