Oh no! It looks like they've been a bit starved of light and gone all leggy. I think I'd give up on these to be honest, and start a new pack. Having said that, my seedlings of cerinthe were very leggy too so I transplanted them up to their necks in some fresh compost and they are doing fine now....but they are much bigger and stronger than these tiny things. You could try...but I think I'd not bother.

i wonder if its damping off, a fungal disease that often happens to seedlings if they are in a very moist warm atmosphere.

That's it - see answers to the previous question!