having played a few games of it, i just thought that the MAX button should not be nearer to 2x or the Roll
I mean, i could accidentally click MAX instead of 2x, then ROLL. and lost everything without knowing it

Wowowo, that's so funny you post that. I did that mistake too when playing with my 0.02. It actually worked out for me though; I won! haha
I was actually worried that something like that might happen.
Maybe a confirmation that you're betting your entire balance would suffice?