Okay I don't know what sort of feed back are you looking for but I found a few things, that doesn't break the game,but seems somewhat off.
1: Like in the begin you are able to run under the two platforms by jumping under them, I would figure you would be able to do this at other places with the same set up.
2: The fact that you full a bit down each time you run over ladder and have to jump and move to the side is a bit annoying and if you continuously jump there it causes to much shake. I suggest you when you star that drop just place the y coordinate at such a level that you can still press right or left with out jumping.
3: the coordinate display when clicking. I know it's just for testing,but you need to remember to hide it better since I can see the bottom of the text above my HP.
4: the doors you don't have key mushrooms for you are able to move into and jump and that looks bad, again just place the the x a bit to the side that you can jump up without hitting the door roof.
5: (5200, 3120) coordinate as example, I see you let the collision detection be a bit into the blocks that gives it more a grassy feel to it,but this caused me nor to be able to move forward even thou it was a straight walking area. around that same platform area the platform moves into the bottom block , but the the transparency of the moving platform seems to overate them and it makes it looks silly (5200, 3230).
So far I like it for a first game