Biggest issues:
- controls are clunky (up to jump, needing to hold a button to climb/grab a ladder, etc
- art is a bit plain/amateurish, animation is practically non-existent
- overall, everything's a bit small. hard to read text, hard to really tell what my character looks like
However, I will say, the game functions - nothing feels like it doesn't work, or is broken. Even the jumping, though oddly set up, worked nicely, which is surprisingly uncommon in 2D platformers. I'd say revise the controls, make everything a bit bigger and more discernible, and extend the game a bit, and you'd probably be onto something.