Not sure if this counts as an exploit, but yesterday in the daily challenge it occurred to me that it is possible to earn an unlimited number of points fighting the Egg Cannon on easier difficulties as it continually spews out endless chickens without any other more dangerous attacks. If you use an auto-locking weapon or one with restricted range (basically lightning fryer, plasma rifle, positron stream, or laser cannon) it is possible to endlessly farm the wave without hitting the cannon.
They stopped dropping powerups after a while, but continued to spawn food, coins, and keys endlessly - I was able to farm a solid million off of them before I got sick of it (and I’m not hugely patient). These points are then multiplied at the end of the level by things like difficulty bonues and could hypothetically give someone an absurdly high score.
Now this isn’t really an issue in normal missions - it’s not really much different to farming any other way - but I imagine a player who is better at the game than I am could get an unreasonably strong edge over the competition in an easy or intermediate daily challenge should a 1-stage cannon happen to be one of it’s bosses.
Is this intended behavior? It feels like it’s an exploit to me.