Replaced Timing Belt Now Won't Start

2002 Kia Spectra 65,000 manual

Replaced timing belt at home for maintenance. Now car will not start.

Starter will crank and I can see the engine turn with the timing cover off. I removed and reinstalled the timing belt making sure to align the marks. No change. I took it apart again and turned the crank 360 degrees thinking that somehow the timing was one full rotation off. Still car does not start.

Fuel pump runs and I get spark. What else can I test? What could have gone wrong? If I had the timing wrong initially and I bent a valve would that cause it to not start? Any diagnostic tips thank you.