https://powdertoy.co.uk/Discussions/Thread/View.html?Thread=13955&PageNum=0#Message=204432
I made this post a while ago, Yes you can make the tail not grow, the easiest way, set the .tmp to 3.
As for controllable, I did plan to add this eventually.
neither I would choose for something totally diferent so you can have 3 players xD
Cool! But I think it's very hard to defeat the CPU controlled TRONs :), they're unbelievable dexterous! (Try place a LOT of liquid above them)
Wait, will there be a mini-game: TRON fight in TPT Online? XD