I tried the game and it is really good But there's room for imrpovements
1. You should start out with explaining the mechanics in the beginning so the player understands what to do because many players won't look at the controls layout. For examle a text with "press and hold X to move the log" and "Press Y to jump" when you're at the hole and so on. I understand that you don't want to ruin it with text but I can see many players getting stuck straight away and just give up Or maybe just a sign with symbols explaining how to do it and what to look for.
2. Gravity is a bit low. It feels like you're on the moon when you jump and fall. I think it should be much better if the gravity was more like here on earth. Had some trouble predicting when to jump when the gravity was so off. And you're probably used to it by now so maybe you haven't noticed. That tends to happen to us developers
3. Maybe you could make the character raise her arms while falling so it really looks like she's falling. Now she looks like she's doing "the nail" into a pool.
4. Lastly, when you get eaten by the piranhas the skeleton suddenly get white. I think you should keep the silhouette theme and keep it all black. Now it looks like someone is pointing a spotlight at the skeleton all of a sudden.
But other than that it's a great start and if you keep up the great work you'll soon have a hell of a game. Good luck m8!