How to Make a Digital Prototype

I usually don't make a digital prototype unless I already feel like something is there. With Spell Tower, it was like I knew something was interesting about the letters moving so I made a digital prototype because dropping tiles down is like pretty simple. And then I got home and my friend was like, hey, how was it? And I was like, ah, I made this thing and I showed it to him and he was like, this is great. So this happened without going on too much of a tangent. This happens in class because the students have to make a prototype and they have to present it. The temperature of the room, as my TA calls it, is different than their