A tourney hand I should've slowplayed?

[tourneyplayer]

Very 1st hand of 50+5 ST....I'm in middle position
One limper, folds around to me.
I hold KK, and raise to 200.
One caller just to my left.
Flop comes 3c5sKd.
I check, he bets 100, I raise to 300, he folds.
I could've induced a rebluff, no?
I very rarely slowplay in tourneys...especially early....should i have played reeeally slowly here?
Comments appreciated.