A few people said that they feel okay about the semi-bluff. And normally, its an okay-ish play with that hand and that board and all, but I gotta point out that in a freeroll your fold equity drops considerably (you have less chance than normal of making someone fold). As such, i don't really like the semi-bluff here too much either. Given your situation, i'd probably fold that flop to a pot sized bet. I'd definitely fold to his shove.

Which of course is why I would either fold or raise preflop.