i was almost ending the level 37 for another session and suddenly, when just defeating an opponent : the game switched to another count-guess... but no opponent com'up. so i just tried (and failed) this count-guess. and nothing happened then. i tried to press enter again and again but nothing.
if i have to put hypothesis : it's the timer who collapsed OR the game is stucked somehow in an infinite loop (the opponent is not here but the player has already tried the guess). else i don't know
for me not a big problem, these games are short so it's not like if i was at the end of a 30 hours long game without save and *tchioup* bsod... but maybe you dev want to know that pokebug is hidden in the herbs, so watch out.