I wouldn't worry about interviewers frowning on your startup, as long as you're learning. The ones who will you won't want to work for. I have seen interviewers

I wouldn't worry about interviewers frowning on your startup, as long as you're learning. The ones who will you won't want to work for. I have seen interviewers make the mistake of thinking someone is inexperienced just because they haven't 'worked on a team of X size' but as long as you can talk about the technical side and what you did/learned you should be fine.