Lol this game insane. It's kinda fun but it loses its value real quick once you become unstoppable, I would have liked for a recoil reduction upgrade. Within 10 minutes of endless mode I had well over 2k silver bullets and 500 of both gold and grenades.
In the end I was flying around the map by shooting at the ground.
Tips for those struggling with ammo.
- Before you click through all the starting buttons you can plant silver bullets and stockpile a bit so you have a fair amount to start
- Aim for having the two plant upgrades to level 2 first, when you hit a stage with the plant stealing aliens leave one alive at the end of the stage and just keep planting and collecting. The alien can't keep up
-At level 3 of gun cool downs silver becomes automatic, and I'm assuming at level 7 the pea shooter becomes automatic as well.