Your app looks very promising. Polished UI. Intuitive. Unlimited habits. Simple "task -> award" principle without added complexity layers.
Something I'm having trouble finding in the apps I've tried is the distinction between "habit" and "task". An habit is something I want to do multiple time in a week. While a task is a one-shot TODO that I would like to execute at some point when I'm not procrastinating. Once done, I don't need to repeat it, but I like to be rewarded.
Your application seems to be more habit oriented. Is the notion of a one-time task something you could eventually incorporate?