Haaa! Finally, a connoisseur of FM-sounds depicting with it the icy landscape. So in my book that is definitely a plus in my books. Though I have to say I’m not the biggest fan of the Celesta. While it works for conveying that sparkling of light, it also reminds me of Christmas, for better or worse :D.
Nonetheless both your songs conveyed that described scene well and build a very chilling atmosphere. Though I think it might not fit the term ambiance the best. It most certainly is ambient but it misses some element of swallowing the listener with environmental noises while taking also a step back from the listener. I do believe there is potential for that thing in there. But it would need some refinement to show. Maybe set sound sounds to convey that sound of rippling water. Also creating a wider stereo image with instruments placed more throughout the stage might help. Lastly, while fm-sounds are awesome, the also need some additional tinkering. I thing adding some more effects in taming and enhancing those sounds would lend itself to an even better atmosphere,
Given that I think you still did well and should be proud of what you’ve done.