I was able to cast "Into the flood Maw" even if I didn't have any open mana. From this point the game was totally broken.
BTW spell wasn't really casted, seems like the card stayed on the stack, and from that point I wasn't able to cast any other spell.
My untap step was always skipped, then when I played another land, at the end of the turn it returned into my hand, and I also drawn a card which looked like sleeve. I think one of my turn was skipped too.

Platform: android