I gave it some cash but in the end, with my risk configuration, it wasn't 'exciting' enough because orders don't really get taken very frequently. I think You'd have to deploy much more cash than I did (> $1000) and trade at least a couple dozen securities to really make it 'fun'.

A major improvement to the software that I didn't get around to was a script to identify which securities offer the best market making opportunities (e.g., maybe by generating a custom YAML file).