Killing cavemen is a bit tedious, reduced enemy health would definitively make for a more dynamic gameplay, if you update it late, I'd give it another go. The game was very smooth and I had no bugs, and well done for that.
Viewing post in Bug The Crash jam comments
I updated the source code version to be more balanced, but I cant change the jam file so if you wanna play the blanaced version download the source from the repo (https://github.com/MrCatNerd/Bug-The-Crash) and install pygame-ce and run the python file but this is not the jam entry so don't vote based on the better version if you decide to play it