Is this on an android device, in which case what's the RAM like? This sort of error is usually due to there being too many assets loaded on a device without a lot of RAM, it's something that I'd like to handle in the future when I have time but there isn't a fix to it, unfortunately...
Ok thanks for telling seems like mine has only 4gb RAM cuz I am trying this on a budget phone but I think it would be great if you would tell in the about of the game the requirements for a smooth gameplay with minimal crashes. I think this would help the newer Android players but that is up to you.