Hey! Yeah I know what you mean.
Random battles is not a feature that comes included by default on 2DFM, but it can be done, and it's definitely the next "big" feature to be included.
It will take a little while tho.
There's an updated version with a low difficulty curve which I implemented because too many players struggle in Sphynx's stage. (I've had to come out and apologize for it). But I hope it helps in the meantime!