Completed the game in 35 minutes with 18 deaths. Here is what I think:

Positives:

- Cool concept with two worlds.

- Cool jumping mechanics which made me think hard how to reach places especially last two faeries.

- Open world, collect diamonds and faeries in any order you want although from left to right is obviously the most logical one.

- Nice retro graphics

- Nice music, I liked how it was different for each world.

Things to improve:

- Not being able to kill beasts that attacked you was very annoying.

- It would be better if there were a status bar with lives left, number of collected diamonds and faeries. Time spent and amount of deaths should not appear on status bar to maintain the peaceful non hurry atmosphere. If it is not so already then timer should stop when character is not moving, so that player can go and have a time off screen.

- Sound of bats flapping their wings was ok, but sounds wolves made were annoying and unrealistic.

- Sometimes when jumping the character made annoying screeching sounds, seemingly randomly or maybe it was when hitting a wall I don't remember exactly.

- Invisible platforms were not a good solution except that one time when they represented tops (bottoms) of roots.

- White dashed line rectangles looked ugly and out of place.

So game is good on major points but has minor issues that could be improved.