9. Keep An Eye Out For Coin Crates
You’ll encounter minions that require a stern shooting, but don’t go in a blaze of glory, and keep an eye out for coin crates. Shoot coin crates in order to get extra HP and ammo.
10. Pay Attention To Stages
Stages tend to have the same pattern, so if you play a lot, you’ll get accustomed to the pattern in no-time, and you’ll know when to strife left, and when to avoid things on the right. Go for a couple of test runs before committing to a serious run, and see how many obstacles you can predict, and successfully avoid.