I closed my startup 1 year ago.
Your career prospects are at least what they were before you started your company, but you will have to answer much different questions than most people.
1. People will be concerned that you don't want to work for anyone else. It is important to remind the people that you meet with that you were willing to take on many, many more bosses than a typical employee. Customers, investors, future employees etc. You can talk about how you helped them etc.
2. If you are a developer, there a lots of options. Business is harder, but there will be life after your startup. (I can code a tiny amount but I am not a real developer. I am really knowledgeable about finance and financial modeling. It took me about 30 days to find something in finance... more on this below)
3. When I decided to shutdown my company, I emailed basically everyone I had talked to about the company and told them first that I decided to shut it down and thanked them for their previous help. I did it because it was the right thing to do, but it actually helped a lot in my search because people all offered intros when I asked later on.
4. Asking for intros is the way to go. Find companies that you like and find a 2nd connection there or 1st connection there. If it is a 1st connection, tell them you would like to grab a coffee with them to get information about their experience at the company you are interested in. If you have someone who is a 2nd connection at a company you are interested in, ask the intermediary connection for an intro. Most people will happily help!
5. When you shut down your company, you will probably want $$$ immediately. Try to resist taking the first offer unless you are sure it is a good fit. I made the mistake of taking an offer from a manager I wasn't sure about and it turned in to a full disaster.
6. Email me if you need help with your story or want to understand the introduction process better. (email in profile).
Best of luck, you will either have success in your company or finding another role. In 2 years, this period of extreme stress will be behind you so just keep doing the right things.