The game got me! which is very cool
For a short joke game it's fine, but you mention you want honest and constructive critisism - I think you could have challenged yourself a bit more: the character itself was cute, but the tileset was a bit weird, especially the background.
If we put the graphics aside for a minute, as you used external resources - I think this game main strength was the twist, but than it just kind of over? I think you could have pushed it a bit more and have some more levels that have some actual gameplay and some more aha moments.
The platforming was actually pretty decent - it just needed a bit more scope to truly shine