I could see this being an actual game and not just a game made for a Jam, for example by adding some little power-UPS or if you want to push the thing really far, a skill-tree xd. For some reasons i feel like it could have the same gameplay potential as Cookie Clickers (with the simple game mechanic yet addicting and the possibility to add endless things like mentionned above). Sound effects are pretty cool, art style is like a flashbang in CS-GO but pretty cool to look at, the little sounds in the background that are not specially needed just makes the game more alive when playing (wish there was a music mute button though). My PB is 4:30 which is close enough to 4min, and i reached 17m population in about an hour^^
Overall i think the game fits the theme of the GameJam and is pretty fun to play