First off, thanks for playing! As for the issue you have, it could be a bug in my code (there is indeed a lot of that i need to fix) or it could be just the simple fact that you tried to select more than 3 cards. If its the first case, then I'll probably have to look through the mess of code for it, and if its the second case, I definitely have to make the tutorial more understandable and less text. Also, simplifying the deck rebuilding is a good idea I'll look carefully into! Again, thanks for the valid criticism!