How can you move across and down the periodic table?

I have to do this game board project and my board is going to be the periodic table. Each element is a different space. I need ideas for how to move up spaces on the note cards. For example, one might be your atomic mass increased, move up 2 elements.How can you move across and down the periodic table?
Yer element decayed radioactively, drop down to the nearest stable element.



Go immediately to the nearest noble gas. Do not pass Carbon.



Emit a beta particle. Drop two atomic numbers.How can you move across and down the periodic table?
Isn't the whole point of chemistry that you don't move on the periodic table... and that similarities only run up and down?