Hi! Super cool to see your game! Controls are intuitive and that's a good thing. That hat character is fun. A couple advices I would give:
-When animating the character sprites, draw it 1pixel higher every 2 frames so it would look more like it's walking, that would give more energy to the animation.
- The jump as it is is feeling slow. Fiddling with gravity/jump speed parameters. The character would ascend faster then falling faster too.