Thanks for playing!
> if you added more control on what pals you can get.
Any suggestions as to how I could do that without vastly altering the current gameplay loop?
On the top of my head. Maybe before spawning you pop up two sprites like the 404 error and which ever the cannon hits that is the pal that spawns. I don't know if that will be more annoying or challenging later on with the auto clickers tho.