Thanks for playing and for the feedback! <3 :) While not technically intentional, we did encounter the farmer flying a couple of times as well. Wasn't too game-breaking and kind of funny, so we didn't really care fixing it for the game jam :D
As for the lag, it could be the AI. Honestly, most of the assets are too low poly and the material is too simple for them to cause too much lag, but we'll have a better look at it another time when we have some time again for sure. Thanks for the idea though! :)