pixel art too big/ a lot of empty spaces i can see, below pixel art you got 5 layers of blocks as base, and thats too much.

what you can work on:
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- replace some of the pixel art with wallpapers, and make a maze inside.
- get a funny/ good storyline (depends on you, what kind of story you want it to have)
-use more block combos, not just dirt & grimstones, it gets boring for my eyes.
- use other variations for your parkour, not just guytraps.
- add some background a little bit everywhere.

looks like a profit wotd to me, i can see a huge chunk of rocks at one place, remove that, it looks bad.

so far it looks super minimalist, you need to max out all space, get creative.