hello I'm playerxty and today I was looking for some to analyze and I found yours so let's go.
graphics:
the graphics are great since the proposal is similar to the classic games.
gameplay:
except for some errors in the collision mask (the player holds the wall) the rest is fine.
level design:
well he is average because he is successful in using the player, but he has much more creative ways of using mechanics.
main problem:
FEEDBACK knows that time when you are playing mario and you are attacked by an enemy the mario automatically flashes and is small indicating that he took damage the same valley when he catches the mushroom. I think this is missing in your warning to the player what is happening for example the first time I played the game the only collectible that I noticed was the diamond due to its more blue color that stands out in the scenery but the rest for example the plant of life I went straight because both the character and the plant did not react or demonstrated that something happened I think that a green '+' effect after you took it already solved the problem. other than that I really liked your game 🖒