this game is absurdly slow for a tower defense game even if it's meant as an 'idle' game the progression without any speed up is so obscenely slow that its basically not worth playing without Cheat Engine's speedhack...
seems best to go for brain rate for the first part of your playthrough: best to get infected corpse asap and that lets you blow through enough levels to the point where you can go for blood rate
 "Idle Monster TD"){kind=icon}
 "Bit Heroes"){kind=icon}
 "Incremancer"){kind=icon}