At first I thought the game had bullet time mechanics like call the exterminator then i realised it is slow down in no time at all the game spawn so many enemies it caused unplayable slow down.
it's a cool concept i like the destroyable cabin but you would have been better off to use 2d enemies.
Really? The game doesn't even use 2GB of ram. Your pc has to be pretty outdated for this to struggle. I am running hundreds of enemies at once, no problem, and I have a best buy $250 dollar pc... It's really a junk pc. It's like 6 years old too. And it runs the game with no slow down other than the initial extremely small spike when a new portal activates a couple minutes in for spawning new bad guys. But it only lasts half a second. Strange, I'll look into it. My computer has a harder time running RPG MAKER games... Which is super non-demanding too.