Ok, here I have some remarks for this game. I will list the good and bad parts so that it is easy to follow.
The good parts:
1. The appearance, at first glance, is a good one even if the idea and the gameplay is quite repetitive.
2. The idea is cool and quite captivating.
The bad parts:
1. The game does not have any kind of feedback in terms of sound (no background music or sound effect when the character jumps), and this can influence the good parts mentioned above (the lack of audio part makes the game less captivating) .
2.UI elements (while the game is running) do not scale properly with the screen and remain as small when you enlarge the screen (for example, the landscape with mountains during the game always remains small in the upper left corner.
3. At one point I came across a black block that said "solve", but unfortunately I didn't understand what I was supposed to do. I tried to jump over it, but without success. This should be explained in the tutorial of the game or in the game description, but unfortunately I didn't find anything to help me move on.
4. In the tutorial it was written that the "A" key is for the right and the "D" key for the left, but in fact it was the other way around (not really problematic, but I was a bit confused when I saw that the indications were actually wrong).