Seems we had similar concepts! Idea is sound and movement is fluid, I'd maybe do away with the ammo idea and just keep it unlimited! I just feel a little more time could be added between spawns as I ended up with a rather big horde!
Viewing post in Delivery Ambush (Game Jam) jam comments
Thank you for playing my game. It does get crazy, after x amount spawn the spawn timer drops by a second. I did like the big horde but I guess it can be over powering. For the ammo I could try a system where your ammo replenishes over time, kinda like plasma rifles in other games have it slowly recharge/replenish constantly. I will need to try that out when I get some free time.