There is nothing impossible about that jump. I have made it several times. You just need to jump as far out on the edge of that tile as possible.
I hit the celling all the time, but I will try my best now
edit:
I made it!
edit2:
OK, I've finished.
The difficulty of the level was as hard as I like - pretty easy, with some screen which made me to try them several times. I very liked the challenge with the
turtle - tricky and well thought. It's nice too see, that there are still level makers who don't put monsters randomly. The music fits perfectly into the level atmosphere - adventurous and mysterious at the same time. I didn't like graphics very much, except of final screens with my favourite Nifflas' tileset. Unfortunately, when I really got into playing this level it's ended - but that's because of competition rules, right? I haven't seen other entries, but I think you have big chances.
6/10