Here are some other bugs:

-if you spam too much coins on one spot or very close to eachother, they generate sparkle effects nonstop.

-Coins have collision, so if you hit them from below it will send you downwards or stop your momentum. Although if you touch it from above nothing happens.

-Coins cannot be moved freely when pressing ALT. When on "placing" mode, if you don't place it and just wait, the coin will slowly start to shiver more and more each second.

-Koopas die once they collide with another koopa. Koopas also kill goombas when touching them.


Hope I could help, I will document more found bugs here when I discover them.