Neat prototype mechanic.
It did take some time for me to understand what the controls were since there was no tutorial or control scheme presented in the game or description. Recommend adding the controls in the description if it's not possible to add them in game, and I would recommend a toggle for using keyboard for the sliders since you end up changing values while you're moving. Possibly making it toggle by pressing shift or leaving the spawning to the mouse entirely.
The was some unclarity with when the game was over or if it was infinite at first. After a few red tanks have been defeated and none were left on screen, the blue tanks I had spawned would not move, so I assumed the game was over. I'm not sure how the spawning works whether they spawn when the game loads or a new one spawns when an enemy or wave is finished but, having them appear closer around where the player or their tanks would confuse new players less.
Still I can see this mechanic being used in a strategy unit game like battle cats or clash royal. Not really the best examples but I couldn't recall the right games at the moment