Im unsure if this has been posted before, but here goes:
-If you ctrl-buy somthing in the market you can go to negative money. This doesnt crash you, but its obviously a problem.
-You can ghost through buildings build on bridges.
-If theres a "pressure plate" from a puzzles and a trees spawn onto it messes up the hitbox a bit.
-On occasion a rock and a tree stacked up, seen it a few times, idk when it happens though.
-(Is this a bug?) You can more or less farm exp, if you have the "taxation", "gemtrade", "trade" you can just buy gems and sell them for exp. You lose a bit of money, but nothing compared to the exp gain.