Fun lil game. all the sounds and small animations & vfx made it feel quite polished gameplay wise.
You already mentioned about the balance and aye after some couple upgrades suddenly the whole screen stayed cleared as everything got popd when they appeared on screen. But honestly, for a game jam it's to be expected, requires a lot of iteration to crunch those numbers.
I am quite new to incrementals as a player and as a developer, so out of curiosity was this your first rodeo or have you done incremental games before?