Thank you for your comment!
My game is a bit of an experiment that I was playing with.
I wanted to create a game for the NES, which the Retro Puzzle Maker engine allowed me to do.
https://puzzle.nes.science/home
Unfortunately, it is quite limited. Its simplicity and limitations are very bothersome to me. Creating a nice game in terms of graphics and functionality is very difficult in this case, and one has to make many compromises.
As for the levels, you are right. They are quite simple. I made the game quickly. You can see my first game;
https://ajp-games.itch.io/penguin-sokoban-adventure
I feel that the levels there are more challenging, but the music is not the best :)