tip to get the all gold badge: when you complete the game you get a secret weapon which can one shot EVERY castle so just keep playing and dont be a fool like me who resets when i did not get gold
they literally stated in the game's updates "Midas Gold has been relaunched as Midas’ Gold Plus. In the new game you can play from Google Chrome since we used a different technology called WebGL." so stop complaining and read
when you hit a wall (both figuritively and literally) that you can't pass, what i found that seems to help is to go to a previous level and let your bikes go a few rounds and go back to the level that you were stuck at. this should reset the algorithm a little and allow the bikes to start afresh and hopefully make better decisons.
It's like... the minecraft font or something lol