What do you mean by the "woes" of railgun again?

So, I had already looked at the radar thing a tincy bit, is it actually helpful? I used to play Tanki way back when, it has gotten so much different now. What on Earth is a tankoin? (Well, I've seen it, but compared to one currency, this gets confusing). At least Tanki has a good amount of players these days! ? Fun fact - Crystal boxes used to fall from the sky. So much has changed, wow! ?

What is the difference between html 5 vs flash, in Tanki terms? Are there different graphics? Will the feel be different?