Is tas possible in this game??

It is possible, but since we can't emulate cuphead, it makes it a lot harder. We have to use programs to create macros (unless LibTAS works for pc games).

are TAS runs popular??

They are more popular for very optimized games to see if new strats are possible. I am not the most intelligent on TAS runs, I would go to the TAS forums on TAS videos (http://tasvideos.org/forum/).