Finally won! :D Took longer than I thought. I underplayed the value of traps, thinking they were a one-time thing just like the Exterminator, and tried just investing as much as possible at first to then bash away all pests at once... still can't wait too long before you start dealing with the problem though. At first it seemed a bit like an Idle game, but seems you really can't be too idle either. Simple idea, and good execution, with a pretty balanced array of upgrades, crisp pixel graphics and a difficulty level just on the edge for not-too-aggravating-or-time-consuming. :) First LD40 game I play this year, and it's a great start! Nice work.
-cd-