I want to like this game more, I think it's got a neat premise, but there are a couple big issues holding you back here.
CONTROLS - the controls are really finicky. I skate when i stop sometimes, the movements seem delayed and unresponsive, and have to jump off a ladder and slide back onto it to go down. Since Up is climb and also jump, you might want to keep ladders away from edges. I should be able to walk up to anywhere on a ladder and climb it, that or lock my character to the middle of the ladder so I can only move up/down and jump off.
CHARACTER MOVEMENT - I keep getting caught on random pixels, especially when i'm climbing a ladder direction on a wall, but not just on walls the floating islands and the ceiling too. I can also land short of a ledge and stick to the wall and jump from these ledges. There's something wonky with your environment hitboxes and boundaries.
BEATING THE FIRST LEVEL - I'm currently unable to get passed the first boss. He's floating in the air throwing stuff at me, and I cannot shoot the gun i'm holding, and I can't touch the projectiles, and I get bored of dodging him after about 3 minutes. So I think i'm supposed to be able to fire the gun and kill rats or possible even shoot the boss, but it doesn't work me, and i've been through all my mouse buttons and keyboard keys.
UI - My pause button doesn't work, and there's a box in the bottom right, that when I click on it, it takes me a blank taupe screen that I have to do a hard page refresh to reset. Also, there shouldn't be an "EXIT" button on the main menu screen that closes the menu and takes me to a blank screen I have to hard refresh the game for.
CANDY - What is the candy for? I was thinking maybe it powered my gun or was something I could use to beat the first boss?
I like the idea of a dream-based platformer, where each level the main character has a different world/costume/powers. I think that's what this is supposed to be? I hope you get it fixed soon, I'd like to play this again with the environment, UI, and weapons fixed.