I've seen this topic : Combining Sign in and Registration form
It gives me some answers, but let me show you the issue we're encountering.
We are doing a small app, and we want users to be able to login / register on the same screen. As we want to keep it as simple as it can be, we thought about using this kind of form :
This form could fit well in our case, but some questions:
• is it too simple? Will users take that registration seriously if we don't ask them some email or something else?
• is it too confusing? Are two actions too much for a single form? Should both buttons have the same color? If not, what colors should they be?