Troy-Bilt Riding Mower Won't Restart?

I used my Troy-Bilt riding mower to cut the grass and mulch some leaves that covered most of the lawn today. I tried to keep debris off the top of the mower deck as well as I could, but lo and behold, there was plenty that had gathered there by the time I took a break and blew the mower off with my leaf blower. When I tried to start the mower again, all I get is some clicking.

Any suggestions as to what to check to get this mower running again? Thank you!