Crack your neck like a badass (BA) and put on some red hot chili peppers cause you've got more testosterone than Clint Eastwood and Duke Nukem put together and you're about to open a platoon of marines sized can of whoopass on these little dots all over your screen.
That was the comment I gave to my testers today for the mini game I've been working at. Not to be confused with my main game this is a fairly simple top down shooter style game. To overly simplify the more you kill the more that spawn, everything you kill drops an item, that item you can use to make you more powerful in respect to a couple of categories and sub types, your ability to shoot is based on a kind of energy / mana bar / regen rate, there are bosses, bosses drop keys to the next level, the next level is like this level only harder, there's an unlimited number of levels, and an unlimited number of enemies, you kill X# of enemies to gain a boos door key to unlock the boss, upon killing the boss he simply respawns and you do it all over again, by the time you get all the keys (one from each boss) you'll probably have killed each boss several times.
The number of enemies spawned at first and growth rate are determined by level as are the number of things they drop / more accurately the power of the one thing they drop. You have multiple methods of dealing with them that I'll save until the game is actually ready for public tests which I will likely share with you. So go about your day like a BA for today and see where it gets you, be alpha and you won't regret it.