I'm playing Gun Bros on my Android phone and I'm at level 13 with ~4300 coins. And I have no idea what upgrades I should get to make more progress.
Should I hoard coins until I can buy the more heavy guns at 10k+ coins or should I get one of the 3k ones? Because it would be easier to get more coins with a better weapon?
And what guns would probably be best for progressing as fast as possible? I can go for high DMG or high RPM, should I prefer one of the other at lower levels?