I just downloaded and played the demo, and i think i found the last one :D
But technically, so did you in your video. That is, if this stone-pickaxe-guy counts as the last secret...
Edit: After trying a lot and hearing how you got up there trough the mountains, I managed to collect the crystal thingy too! You charge-jumped this little gap in the mountains across from the waterfall too, right?
Hello Rinaii and thanks for checking out my video! :D
Unfortunately there is still one secret out there, as I already discovered the stoneman in my first video. So let's keep searching! Ohira did mention, however, that the last secret can be seen in my video covering the crystal shard, if we look closely. So I'm going to try to keep searching.
Awesome, congrats on getting up there! Yup, got up from those mountains. It's a lot of fun to be able to "break" the level, but at the same time it's kind of intended for some people to break it, clearly, as there's hidden stuff up there.
