Hello, We just found out there was an error while creating an account if the email adress you use is too long. To be more precise, what's before the "@" have to be shorter than 20 characters. It will be solved in v0.7.3.
And for the performance issue, we just found that ic can be solved, but will have to upgrade the game engine, wich will take some time. So it should be solved in v0.7.4 in a few days.