Go around altitude
So listening to radio , it seems that ATC asked them to climb to 3500 at go around. However, crew instead decide on altitude of 2000 and later mention trying to maintain 2000. And there is a lot of hesitancy in voice. So basically does this imply that even at time of go around, engines were already struggling ? Also tower talks about belly landing, when no such thing was hinted before. Is it possible that tower has seen something untoward for them to suggest belly landing ?