So to keep this short. I increased the spawn rate by double, but I also increased the spawn max on easy, medium, and hard. I excluded very hard as it seems better with double rate.
This being said, it SHOULD make the game more exciting without having to wait 20-30mins for more furries.
However it may impact achievement progress. Hitting wave 50 should be possible on easy mode. Hitting 1 million will still be a trick. I think I may increase the score amount globally to try to help with that issue next update.

Also Endless Furry Killer 3D launches Monday!
https://store.steampowered.com/app/1519470/Endless_Furry_Killer_3D/