Board Thread:Game Suggestions/@comment-26532123-20150531101807/@comment-26534725-20150710174236

5th Tier Spike factory:

Spiked Bombs: Shoots spiked bombs that fly across the screen poppin bloons, then returns next to the spike factory as spike mines.

Now path 2 3rd tier upgrade is Lighting Production, which produces spikes nearly 6x as fast. All upgrades are still the same.