Uh fix this plz – Roblade:Design&Fight Review

On lvl12 each time a try to "walk" the screen goes black and I can't do anything but then it says I won..or loss idk but plz fix this.Its the only thing I found uh well wrong.PS-I found out that it only happens with my 2nd one (which I spent most of my time on) so plz fix this.I can still play just I can't move while playing..,if that makes since.
Review by Joe1gamer on Roblade:Design&Fight.