yeah i visited the 4 red rooms.
game just hung itself in that dream sequence, so I will retry it.
edit:just tried.
it runs until the cat stops moving and the plyers does an automatic jump,
stopping in mid air, game frozen.
Apparently some cutscene or such is to be played out which freezes the game for me
To clarify the small crystals are only used to unlock the gates and you don't need more than 4 to complete the game.
But as long as you are enjoying the game that is all that makes me happy. Do let me know if the end of game freeze still happens, remember to redownload the latest version in case you haven't already.